Graph of basal temperature during pregnancy, normal and pathological menstrual cycle. Now let's look at examples of graphs of BT basal temperature for various gynecological pathologies. Why is she too tall

We are all used to the fact that 36.6 0 C is normal temperature our body. However, this is far from being the case: during the day it either rises a little, then decreases. What is basal body temperature? Basal temperature is the temperature measured after sleep.

What is the difference between normal temperature and basal temperature

Before you go to bed, you should prepare a thermometer and a watch next to the bed so that in the morning, without getting out of bed, you can measure your basal temperature.

Every minute in our body there are complex chemical transformations of some substances into others: the breakdown of some molecules of carbohydrates, proteins, fats and the formation of others. Many chemical reactions proceed with the release of thermal energy, from which the cells and the intercellular substance “heat up”.

The most intense all kinds of chemical reactions occur in the liver, which makes this organ the hottest (38 0 C). Measurable temperature on mucous membranes oral cavity or in the rectum usually ranges from 37.3-37.6, while skin significantly cooler: 36.6 in armpit and about 28 0 C in the heel area.

Basal temperature reflects the degree of heating of our body internal organs without additional heat obtained from the work of the muscles of the upper and lower extremities, torso. In connection with this circumstance, it is measured after sleep until the moment the person began to actively move - immediately after waking up, lying in bed with eyes closed. This will be the most low temperature, since many muscles have simply not yet “been included” in the work.

Normal temperature reflects general degree heating our body, both by internal organs and by the energy received as a result of movement. It will be higher than the basal.

How to measure basal temperature

1. The basal temperature is measured while lying in bed, at the same time, immediately after waking up. If you are working in night shift, then you need to sleep at least 3 hours (preferably 6).
2. To correctly measure the basal temperature, in the evening before going to bed, put a thermometer next to the bedside table so that you don’t have to get out of bed in the morning, and a clock to count the time.
3. It is best to measure basal temperature in the vagina, rectum or oral cavity (whichever is more convenient for you). The lowest temperature will be in the oral cavity (only 0.25-0.5 0 C higher than in the axillary fossa), the highest - in the vagina or rectum (compared to the axillary fossa - higher by 1.0-1, 2 0 C).
4. Temperature measurement time - 5-7 minutes.

A false increase in basal temperature is observed when there is some kind of local inflammatory process: for example, vaginitis. Excluded for the period of basal temperature charting oral contraceptives, alcohol, etc., as they may distort the results.

What can basal body temperature tell you?

1. Elevated basal temperature may indicate a change in work nervous system or some glands internal secretion, For example, thyroid gland, or that any infection(in this case, not only the basal temperature rises, but also the general temperature: with ARVI, etc.).
2. With the help of regular measurement of basal temperature in women, it is possible to identify the days of ovulation, as well as to carry out a preliminary diagnosis of the insufficiency of certain female hormones.

Change in basal temperature during the menstrual cycle

Before ovulation, the basal temperature decreases by 0.2, and then rises by 0.5 degrees, after which it stays within 37.0.

Ovulation, as it were, divides the menstrual cycle into 2 halves: before ovulation and after (the first and second phases of the menstrual cycle). In the first phase, the basal temperature fluctuates between 36.2-36.9 0 C. On the eve of ovulation, a decrease in temperature by 0.2 degrees is very often observed. Then - a jump in temperature increase by 0.4-0.6 0 C, and then the temperature stays around 37 0 C throughout the second phase of the menstrual cycle. 1-2 days before the onset of menstruation, the temperature drops again.

Variants of the temperature curve on the graph	Interpretation of results
There is no pronounced two-phase, the entire cycle is observed a monotonous curve without a jump of 0.4-0.6 0 C in the middle of the cycle	Anovulatory cycle: ovulation did not occur.
Basal temperature at the end of the menstrual cycle does not decrease, but remains high even after 28 days.	Most likely, there was a pregnancy. Basal temperature in this case may remain high during the first 4 months. If it decreases, then this may indicate a threat of termination of pregnancy.
High temperature in the first phase relative to the second phase (jump less than 0.4 degrees)	Possible estrogen deficiency
Low temperature in the second phase relative to the first phase (jump less than 0.4 degrees)	Lack of corpus luteum hormones
Chaotic chart	Perhaps some measurement errors or a significant lack of estrogen.

Pregnancy is a period when the expectant mother carefully monitors her health. After all, now she worries not only about herself, but also about the life that originated inside her body.

It is very important not to worry for any reason, because unnecessary excitement will not bring any benefits. There are some methods, such as measuring basal body temperature, that will help you constantly monitor your health.

This technique helps to identify some dangerous symptoms. By reacting in time, the expectant mother will be able to protect her unborn baby. If there is any deviation from the norm, then it is necessary to urgently seek help from a doctor.

What is BT?

Usually it is abbreviated as BT, less often rectal temperature. As the name implies, it is not measured in the standard way - armpits. There are several options for measuring - in the mouth, in the vagina and in the rectum. With its help, ovulation is often tracked when a woman wants to become pregnant.

The usual menstrual cycle often shows up to 37 Celsius, but exactly until the moment when ovulation begins - then the temperature rises by 0.4 Celsius. After that, or in 1-2 days, it goes down again. But if this does not happen, then, most likely, pregnancy has occurred.

How much should be during pregnancy? And how long should she stay?

Each organism is individual, but normally - 37.1 - 37.3, exactly the temperature is during ovulation and remains so if pregnancy occurs. It is worth remembering that the borderline norm is 37.0. If there is a deviation of 0.8 degrees in any direction, this is a reason to go to the doctor, or at least you should consult with a physician.

Regarding how long she keeps, the answer is unequivocal - from the beginning of pregnancy and the first few months, while the girl is carrying the fetus.

Why measure BBT?

There are two reasons for this - to monitor the health of the mother and child, as well as to plan pregnancy.

The first reason, as mentioned above, helps to understand whether everything is in order with health. And the second reason helps to calculate ovulation. When a woman wants to have a baby, she needs to determine when ovulation occurs. When there is an increase in BBT, this is a sign that it has come, and now most likely get pregnant.

How to measure it during pregnancy?

Be sure to measure should be carried out in the morning, immediately after sleep, when the body is still at rest. Important point- It is desirable that the sleep is full, at least six hours. You can measure it in any way, but rectal is considered the most reliable. Measurement in this way should be carried out for at least three to four minutes.

oral and vaginal methods measurements will also work, however the time is increased to five minutes. Any thermometer is suitable - both ordinary mercury and electronic. It is advisable to take measurements every day and mark them in a notebook or a special chart - it is easier to track the dynamics. It is necessary to carry out the procedure every time at the same time, the allowable time difference is thirty minutes.

Some factors, such as illness, stress, travel, consumption of alcohol-containing products, and even certain medications, can affect the accuracy of the result. Also, do not use contraceptives if you measure rectal temperature.

Norm after conception

Each organism is individual. This can be proved by a simple fact - some people have normal (not rectal) temperature - 36.6, others - 37 and even higher. At the same time, two types of people feel excellent and do not get sick.

So when measuring BT - it all depends on the specific organism. However, you should know the generally accepted and most common norms - from 37 to 37.3. The temperature rises, as a special hormone - progesterone, begins to be produced in large quantities. This happens to protect the fetus.

There were cases when a woman had a rectal temperature - 38, but she was not sick and everything was in order with the fetus. Such cases are very rare, usually, if the temperature is already above 37.3 or below 37, it is wiser to contact the doctors.

Definition of pregnancy by basal temperature

Most likely, a woman is pregnant if the following symptoms are observed:

• The temperature is elevated three days after the end of ovulation.
• If, with a normal two-phase schedule, a girl observes another jump in temperature (this condition is not considered mandatory).
• The corpus luteum phase does not stop for 18 days - that is, the temperature is elevated all this time.

Daily fluctuations in BT

As usual, it is necessary to measure the temperature immediately after sleep, at the same time. The fact is that factors such as light physical exercise, food, and even clothes can affect the result. Normally, when exactly on the day (not in the morning), it rises above 37.3 - however, the reasons for such an increase are just the factors described earlier.

Therefore, it makes no sense to measure it during the day or even in the evening - you will not understand whether the fluctuations are caused by the usual load on the body or there is reason to worry. Just imagine on early dates in the evening, BT can rise by 1 degree! Morning results are the most reliable, so note them.

Raise

If there is a situation with an increase in body temperature during pregnancy, inflammatory or infectious processes. But this is only if the increase was fixed correctly, that is, in the morning. Termination of pregnancy in this case is unlikely, but it cannot be discounted.

About ectopic pregnancy- it may not necessarily cause an increase rectal temperature. Usually it is within the normal range. If this type of pregnancy is disturbed, the woman may feel severe pain in the abdomen, there may even be bleeding. In this case, you can not postpone, you should call an ambulance.

A fall

This also happens. Its fall, especially sharp, should alert. This means that there is insufficient production of hormones. This clearly indicates that the body is not able to maintain female body during pregnancy.

If, along with a decrease in rectal temperature, you notice symptoms such as pain in the abdomen, bleeding, prolonged tone of the uterus, then consult a doctor, you should be examined.

A frozen pregnancy usually shows a result below 37, but even in this case, you should not panic, but contact a medical institution.

When and how to measure?

In the morning, without getting out of bed, at rest and with minimal activity. To do this, you need to take a thermometer and place it in the vagina or rectum for two centimeters. Hold the thermometer for three to five minutes.

It is necessary to measure BT every time with the same method, that is, choose one - rectal or place a thermometer in the vagina. The thermometer cannot be changed either, as well as the time of measurement - if you decide to measure at 8.00 in the morning, then continue in the same spirit. Oscillations can be up to thirty minutes in both directions.

In order to carry out the procedure as accurately as possible, here are a few rules that must be followed:

• Do the procedure in horizontal position and in no other way, don’t even turn on your side, all the more you can’t squat.
• Required good sleep- from five hours.
• It is advisable not to have sex while you are monitoring temperature changes. Or at least maintain a gap of half a day between the measurement and sexual intercourse.
• You can not take drugs - they both lower and increase BBT. It is worse when they increase it - you may have it below the norm, and you will think that it is in order.
• Eat breakfast only after the procedure.
• Try not to get sick - even a sore throat can distort the performance.

Why is a schedule needed?

If the expectant mother wants to seriously monitor this indicator, then you can’t do without a schedule. Different circumstances can affect rectal temperature, especially in the first months of pregnancy.

Usually, the fluctuations on the chart look like this:

1. On the day of conception - from 36.4 to 36.7.
2. The next three or four days there is an increase of 0.1, that is, it can reach 37 degrees.
3. The next two or three days, the value may remain the same.
4. On the day of implantation gestational sac in the uterine mucosa, it decreases to 36.5-36.6 degrees.
5. Further three the day is coming smooth rise and is achieved from 36.7 to 37.
6. The next fourteen days the value ranges from 36.7 to 31.1. It is important to monitor whether it has fallen below the value that was during ovulation.

It is important to indicate in the schedule not only the numbers, but also the possible circumstances that influenced them - illness, stress, reception medical devices etc. The attending physician should be aware of them.

How to correctly compose and decipher a graph: a detailed guide

You can draw it yourself, or find it on the Internet and print it. Include the following in your schedule:

"Pregnant" charts

It is impossible to measure everything with one graph alone, discrepancies are acceptable. At different women there are different indicators. Here, for example, some do not observe implantation retraction, or there are several of them at once.

It happens that the temperature rises sharply, or, conversely, smoothly. Sometimes it does not rise above 37. All the options described are defined by physicians as the norm.

Is it possible to determine pregnancy with a thermometer without a chart?

You can, for this you need to follow the rules:

• In the evening, shake the thermometer and put it next to, but not under the pillow. The main thing is that it is convenient for you to get it without using sudden movements;
• In the morning, without eating, and without even getting up, use a thermometer. Choose either the rectal method or place the thermometer in the vagina. It must be placed two centimeters;
• Wait three to five minutes;
• If the indicator is above 37, you are probably pregnant.

But you can not count on accuracy, an increase can signal an inflammatory process, infection, hormonal failure or normal stress.

Factors affecting performance

To get a reliable result, exclude the following situations:

• Taking medication;
• Use of contraception (oral or spiral);
• Banal lack of sleep;
• Consumption of alcoholic beverages;
• Sex less than six hours before measurement;
• Overwork;
• Any illness;
• Increased normal temperature.

Is it necessary to control during pregnancy?

It makes sense to do this during the first months. It remains elevated until the twentieth week after conception. Usually, not only gynecologists, but even endocrinologists vote for the control of BT.

With the help of BBT measurement, deviations can be noticed in time and reacted to them. Low rates may signal a threatened miscarriage. Therefore, the answer is unambiguous - it is desirable to control it. However, this is not the only way to diagnose the condition. future mother and her child.

At different stages of pregnancy

Consider the basal temperature at various stages of pregnancy:

• Week 3 corresponds to the 1st embryonic week. BT shows from 37 to 37.7 and slightly higher. The mark below indicates deviations and the danger of miscarriage.
• N. 4 in the range from 37.1 to 37.3 °, maximum - 38. If higher, then it is possible that this is an infection.
• H. 5 is stable from 37.1 to 37.7. If she “jumps”, then pay attention to other signs: drawing pains, hardening of the abdomen, softening of the mammary glands, etc.
• N. 6 retains the previous results: from 37.1 to 37.7. If it rises or falls significantly, fetal death is possible.
• N. 7-8 from 37.1-37.3 (not lower) and not higher than 38. For non-standard indicators, pass additional diagnostics health (ultrasound).
• N. 9-10 - as during weeks 7-8, but more than 37 and below 38. If this is not the case, consult a doctor.
• N. 11 decrease from 37 to 37.2. If it is still high, then consult a gynecologist.
• N. 12 from 37 to 37.8, but not higher than 38. Ideal are from 37.6-37.7 °.

The last weeks show from 36.6 to 36.8. At the fortieth week, it rises to 37.4 and can rise immediately before childbirth.

Deviation from the norm

If it deviates from the norm, then it is either ovulation or pregnancy. During pregnancy, the doctor often recommends that you measure it to eliminate the risk. Especially often this method is recommended for those who have previously experienced a miscarriage or problems during gestation.

Why is she too tall?

This may be due to an infection, due to an inflammatory process, or even an ectopic pregnancy. In this case, you need to monitor some other signs: does the stomach hurt, what color is the discharge (normally transparent). If you see them, you need to do an ultrasound.

Possible threat of interruption

This is signaled by a decrease in BT. The decrease is due to a lack of progesterone production. If the result falls below 37, in addition, abdominal pain and discharge are felt. Brown need to seek help urgently.

Frozen pregnancy

Unfortunately, in this case, you will have to extract the fetus, it threatens the woman's life. It does not always come out on its own, because of this you will have to seek medical help.

Other signs that signal the fading of the fetus are the absence of toxicosis, the mammary glands no longer increase.

Is there a low BBT during normal pregnancy?

It is difficult to talk about norms - they are always conditional. Not always low temperature prevents the fetus from being born, women give birth healthy babies and their lives are not in danger. In addition, there may be such an option - during ovulation, just before conception, the temperature was 36.4, so it is unlikely that it will reach 37 during the next two weeks.

However, if there are such signs - pain or opaque discharge - you should go to the doctor.

Basal temperature of a healthy woman

The norm is not lower than 36.2, but not higher than 37.2. Before ovulation, the temperature drops, while it rises - this determines the most probable moment for conception. After conception, it practically does not decrease.

Signs of probable infertility according to the schedule

This is indicated by the following:

• The average of the second phase of the cycle (after the temperature rises) exceeds the average of the first phase by less than 0.4 degrees.
• In the second phase of the cycle, the temperature drops change (it is below 37).
• The rise in temperature in the middle of the cycle lasts more than three to four days.
• The second phase is short (less than eight days).

Schedule for ovulation stimulation

With, especially clomiphene (clostilbegit) and using, in the second phase of the MC, the rectal temperature chart usually becomes “normal”. Two-phase, with a pronounced phase transition, with enough high temperature in the second, with characteristic “stages” (the temperature rises twice) and a slight drop.

If the schedule during stimulation is violated and deviates from the norm, this may indicate an incorrect selection of the dose of drugs.

An increase in the first phase during stimulation with clomiphene also occurs with individual sensitivity to the drug.

When to contact a gynecologist?

If you are serious about BBT and see a problem for two cycles in a row, see your doctor. However, he should not prescribe drugs only on the basis of the schedule, you should be referred for other types of examinations. Pay attention to such factors:

• Novulatory charts.
• Constant cycle delays, while pregnancy does not occur.
• Late ovulation and you don't get pregnant for a couple of cycles.
• Controversial indicators with indistinctly expressed ovulation.
• Graphs with high or low temperature throughout the cycle.
• If the second phase is short (less than 10 days).
• High rates in the second phase of the cycle for more than 18 days, while there are no periods, and pregnancy has not occurred.
• Bleeding or heavy discharge in the middle of a cycle.
• Profuse discharge during menstruation, which is more than 5 days.
• Graphs with a temperature difference in the first and second phases of less than 0.4.
• Cycles less than 21 days or more than 35.
• Schedules with a well-defined ovulation, regular intercourse during ovulation, but the woman does not become pregnant for several cycles in a row.

BT as a method of contraception

They can be used because highest probability the fact that a woman becomes pregnant - during ovulation and two days after it. And since in this way it is possible to calculate given period, then it can serve as a method of contraception.

Do you trust this method?

They can be used as additional method pregnancy control and planning. However, you cannot rely on it alone, because modern methods diagnostics are more accurate. But how additional measure BT measurement is a great idea.

This is a research technique based on the hyperthermic effect of progesterone on reproductive system. Basal temperature during pregnancy is rectal (oral or vaginal) indicators obtained after a night's sleep in a state of complete rest of the body.

BBT measurement belongs to the main category of informative tests that determine the performance of the ovaries and reproductive system women.

In what cases is the basal temperature method relevant?

1. Unsuccessful attempts to get pregnant for a year or more.
2. If infertility is suspected in one of the partners.
3. Signs of hormonal imbalance.
4. Compliance with the recommendations of the gynecologist when planning pregnancy.
5. In order to prevent conception, the method accurately determines the "dangerous days".
6. As an experiment when planning pregnancy with the sex of the unborn child.

Take notes

From the temperature graph, you can find out the following processes.

1. When the egg matures.
2. The day of ovulation or its absence.
3. To identify dysfunctions of the endocrine system.
4. Determine diseases of a gynecological nature, for example, inflammation of the appendages, hyperprolactinemia, endometritis, lack of hormone production.
5. The time of the next menstruation.
6. Whether the pregnancy started with a missed period or unusual bleeding.
7. Assess how the ovaries secrete hormones relative to different phases MC, is there a shift or not.

An accurate interpretation of the basal temperature chart can only be given by a gynecologist. However, a preliminary assessment can be carried out independently if you know the norm and deviations of the temperature values ​​​​on the curve.

The rationale for the BT method lies in the analysis of the production of sex hormones, under the influence of which there is a decrease or rise in temperature indicators in different days cycle.

In the first (follicular) phase, there is a surge of estrogen, which causes a decrease in values ​​to a minimum. Normally, when the follicle matures, the temperature should not exceed 37 ° C.

Immediately before the release of the egg, there is a slight decline in performance. Then the temperature gradually rises to its maximum, which means the onset of ovulation.

At this moment, active synthesis of progesterone begins, which causes an increase in indicators to 37.1–37.3 °. Before menstruation, there is again a slight decline in values. During menstruation, the temperature is about 37 ° C.

This detailed description normal biphasic BBT schedule. Any deviations may indicate violations of the reproductive system or pathology.

How is basal temperature measured?

Proper construction of a BT schedule requires strict observance all recommendations of gynecologists. Any deviation distorts the indicators, which can lead to an ambiguous interpretation by the doctor.

Algorithm of actions when measuring basal temperature at home.

1. The study is carried out daily, including periods of menstruation, at least 3-4 months.
2. It is allowed to use any thermometer, digital or conventional thermometer. During the experiment, the device cannot be changed.
3. To obtain reliable results, the temperature can be measured through the buttocks, vagina or mouth. Preferably rectal. The measurement method remains unchanged.
4. Night rest should last at least 4-6 hours.
5. When waking up, you can not get up, move, spin, even shake the thermometer. Therefore, in the evening, put the thermometer on the bedside table in order to measure the temperature in a state of complete rest.
6. The study is carried out in the morning at the same time. The optimal interval is from 5 to 7 hours. A deviation of plus or minus half an hour is allowed.
7. The indicators obtained during the day are taken into account if the woman works at night. Sleep for at least 3 hours is a must.
8. The temperature measurement is carried out for 5 minutes. The values ​​are immediately indicated in the graph.
9. It is important to write down comments in the notes, which indicate the abundance of bleeding and the impact external factors. For example, drinking alcohol or having sexual intercourse the day before, colds, ailments, abdominal pain, medication, etc.

Example:

basal body temperature chart

What should be the basal temperature after ovulation during pregnancy

The first sign of conception is a delay in menstruation against the background of consistently high BT rates, while there is no drop in values ​​before menstruation.

A prerequisite is sexual intercourse two days before the onset of ovulation or on the day of egg maturation. basal temperature in different periods The menstrual cycle can change under the influence of hormones.

For the beginning of the MC are characteristic normal performance temperatures around 37°C. In the second phase, under the influence of progesterone, BBT will be higher. How to schedule to know that pregnancy has occurred.

1. Before ovulation, the indicators are slightly lower than normal, and after the release of the egg, the temperature rises sharply.
2. There may be a discharge that disappears within two days. This is due to damage to the endometrium when the zygote is introduced into the inner layer of the uterus.
3. A similar phenomenon is usually noted on the 7-10th day after ovulation. The graph shows sudden jump low temperature, which is called "implantation retraction".
4. The difference between the values ​​before and after ovulation is approximately 0.4 - 0.5 ° C.
5. If the basal temperature continues to remain elevated with a delay in menstruation, then we can talk about successful conception.

The moment of ovulation

When using the IVF method according to the BT schedule, it is difficult to determine pregnancy. Before egg transfer, the patient is prescribed progesterone preparations, which cause an increase in rectal and general indicators.

Basal temperature in the pregnant cycle

Gynecologists, as well as endocrinologists and therapists, recommend keeping a BT schedule for the entire first trimester of gestation. The rules for measuring during pregnancy remain unchanged.

After the fourth month, the control of rectal indicators no longer makes sense. However, during implantation of the egg and up to the 20th week of pregnancy, the temperature should always remain at the level of 37.1-7.3 ° C.

The BT table will show how the woman's condition changes in the early stages of pregnancy, as well as signs possible complications. If the indicators begin to jump, that is, the graph shows a sharp decrease or increase in basal temperature, then we can talk about pathology during pregnancy.

BT sinking, that is sharp drop temperatures up to 37 degrees, indicates a lack of progesterone production, which can lead to miscarriage. The woman is discharged hormonal preparations, for example, "Dufaston".

If BT during pregnancy rises to 37.8 ° (or more) and lasts for several days, then this may be the result of infection or the development of an inflammatory process.

On late term pregnancy, usually at the 40th week, BBT rises to 37.4 ° and above. Before labor pains, high rates are observed.

BT in ectopic and missed pregnancy

gradual fall

Anembryony (death of the embryo) is accompanied by a decrease in rectal indicators. The development of pathology is more often observed on early stage formation of the fertilized egg.

The process of non-developing pregnancy proceeds gradually. For some time, by inertia, hormones continue to be produced by the cells of the chorionic membrane. Therefore, even against the background of the fading of the fetus, signs of pregnancy persist.

If the graph shows that BT falls simultaneously with the appearance unpleasant symptoms(pain in the abdomen, toxicosis and tension in the chest disappeared), then you need to urgently run to a specialist.

A characteristic sign of a missed pregnancy is when the basal temperature has fallen below critical level 37 °, that is, returned to the indicators preceding conception.

There are cases when the development of the fetus proceeds normally, without manifestations anxiety symptoms. At the same time, signs of anembryony in the form of an increase in BBT and malaise occur suddenly.

A high temperature of up to 37.8 ° and more during pregnancy may appear due to the development of sepsis against the background of fetal decomposition. Therefore, any fluctuations in values ​​require medical attention.

An ectopic pregnancy in the early stages of the BT schedule is difficult to recognize. Normally, gestation should proceed against the background of elevated temperatures.

Signs of ectopic pregnancy are more likely to appear at the 5th week and later. BT rises more than 37.8°, accompanied by dark brown discharge, strong pain syndrome in the abdomen and other unpleasant symptoms.

The condition threatens life and health, therefore, requires immediate hospitalization.

Every woman has this picture.

Basal temperature of a non-pregnant woman

Normally, in the luteal phase of the menstrual cycle, BT is kept at about 37.1–7.4 °. When planning conception, sexual intercourse is recommended 1-2 days before or on the day of ovulation.

In the absence of pregnancy, the indicators of the normal biphasic graph display the following values.

1. The first sign is that on the 7th–10th day after ovulation, the egg is implanted, which is reflected on the curve by a sharp decrease in BBT less than 37°. There may be minor spotting due to damage to the endometrium. If there is no implantation retraction on the curve, then the pregnancy did not take place.
2. The second sign is that with successful implantation, the schedule becomes three-phase. BBT remains above 37.1°. In this case, there is a delay in menstruation. The main factor - in contrast to the schedule with a confirmed pregnancy, there is a slight decrease in rectal indicators before menstruation.

An example of a BT schedule in the absence of pregnancy:

no pregnancy

Basal body temperature (BT) is the lowest temperature human body measured at rest. Determining the level of basal temperature allows you to predict the onset of ovulation and determine pregnancy at its earliest stages. The technique is also included in the scheme of natural regulation of conception and is used to detect various gynecological diseases.

Measurement Rules

When determining the basal temperature, certain rules must be followed, otherwise the data obtained may be misinterpreted:

1. BT is determined only in the rectum. Measurement of temperature under the armpit or in the mouth does not give reliable results.
2. Measurements are taken in the morning, without getting out of bed, before the start of any physical activity. For convenience, keep a thermometer handy.
3. Before starting the study, at least 4 hours of restful uninterrupted sleep should pass.
4. Measurement of BT is carried out with an electronic thermometer - the same. Can be used mercury thermometer but with great care.
5. The study should take place at approximately the same time of day. Deviations of 30-60 minutes in any direction are allowed.
6. The study time is at least 5 minutes.
7. There is no break during menstruation.

The data obtained is entered daily into a table. In the future, on the basis of the results obtained, it will be possible to draw certain conclusions. To assess the menstrual cycle and identify gynecological pathology, it is recommended to measure basal temperature for at least 3 consecutive months. It is advisable to start the study on the first day of the menstrual cycle (i.e. the first day of menstruation).

Is it possible to measure basal temperature during the day? Yes, after 4 hours of sleep. Unfortunately, such results are often unreliable, so it is not recommended to rely on them. If a woman works on a night shift, she can conduct research during the day, provided that this is her usual, practically unchanged regime of work and rest for many months.

Indications for measuring basal temperature

The study is carried out in such situations:

• Menstrual disorders (if you suspect an imbalance of hormones).
• Diagnosis of pregnancy at an early stage.
• Determination of the time of ovulation.
• As part of the MCI (method of recognizing fertility as natural way contraception).
• Assessment of the hormonal background for some gynecological diseases(including infertility).

In most cases, the measurement of basal temperature is prescribed when planning pregnancy and identifying the causes of infertility. This examination will also be useful when looking for factors that lead to menstrual irregularities (delayed menstruation, lengthening or shortening of the cycle, etc.).

Measurement of basal temperature is not carried out in such situations:

• If a woman is not able to measure the temperature at about the same time (special work schedule, etc.).
• In the presence of acute inflammatory processes or exacerbation chronic pathology leading to an increase general temperature body.

In the latter case, the study will be non-informative. It is recommended to wait for recovery and only after that return to the measurement of basal temperature.

Important Aspects

There are factors that affect the level of basal temperature:

• bad dream ( frequent awakenings need to get up in bed at night);
• stress;
• diseases digestive tract(including diarrhea);
• ARVI (even without an increase in armpit temperature);
• alcohol intake;
• intimacy;
• long flights;
• change of time zones, climate;
• reception medicines(including hormonal, sedative, sleeping pills).

All these factors should be noted in the table and taken into account when interpreting the results.

Basal temperature and menstrual cycle

Determination of basal temperature plays a big role in assessing a woman's menstrual cycle. Consider the change in parameters using the example of a normal 28-day female cycle.

The first (folliculin) phase of the menstrual cycle lasts from days 1 to 14 and is under the influence of estrogen. At this time, the follicles mature and the dominant one is isolated among them. The BT level during this period remains in the range from 36.1 to 36.7 °C.

Ovulation with a 28-day cycle occurs on the 13-14th day. The maturation and release of the egg coincides with the peak level of LH (luteinizing hormone). The day before ovulation, the basal temperature drops by 0.5 °C. Immediately at the time of ovulation, BBT rises again, reaches 37.0 - 37.4 ° C and remains at this level throughout the second phase of the cycle.

The second (luteal) phase takes place under the influence of progesterone. The endometrium grows in preparation for possible implantation fertilized egg. If fertilization does not occur, a ruptured follicle is replaced by corpus luteum. From days 14 to 28 of the cycle, the basal body temperature remains above 37.0 °C. The decrease in indicators occurs only before the menstruation itself, in 24-48 hours. During monthly bleeding, BBT remains low (from 36.1 to 36.7 ° C).

Basal temperature and pregnancy

If a child is conceived, the basal temperature remains high throughout the first trimester. It keeps at around 37.0 - 37.4 ° C, and only after 14 weeks begins to gradually decrease. In the II and III trimesters, the basal temperature is fixed within 36.4-36.7 °C.

An increase in basal temperature during pregnancy indicates the following conditions:

• inflammatory process in the appendages and uterus, pelvic organs, intestines;
• general infectious process.

A low level of basal temperature occurs in such situations:

• the threat of termination of pregnancy;
• a miscarriage that has begun;
• regressive pregnancy.

In all these situations, there is a decrease in the level of progesterone, which determines the change in basal temperature. Any deviations from the norm should be reported to the doctor.

Deciphering the results

With the correct measurement of basal temperature, a woman can find answers to the most important questions for herself:

• Is the menstrual cycle normal, and are there any deviations.
• Does the maturation of the follicles occur, is it worth expecting ovulation.
• Was there ovulation in this cycle, and on what day did it occur.
• Whether the conception of a child has occurred or the onset of menstruation should be expected (you can determine its arrival 24-48 hours before the onset of bleeding).

Deviations from the normal schedule raise suspicions endocrine pathology, suggest the causes of infertility and timely identify some complications that occur in the early stages of pregnancy.

Normal performance

To assess the menstrual cycle, it is necessary to chart the basal temperature for at least three months in a row. The graph is lined up on a sheet in a box. A coordinate axis is drawn, where the basal temperature indicators will be vertically, and the days of the cycle will be horizontally. Each day of the cycle will have its own mark on the graph - the level of basal temperature. At the bottom, under each day of the menstrual cycle, factors that could affect the temperature (stress, sexual intercourse, illness, etc.) must be indicated.

Normal indicators of the menstrual cycle:

• The total length of the cycle is 21-35 days (from the first day of one menstruation to the first day of another).
• The duration of the second phase of the cycle is always 12-14 days.
• The duration of the first phase of the cycle may vary. Its minimum duration is 7 days.

Normal values ​​​​of basal temperature are presented in the table:

Temperature curve options

There are several varieties of the schedule when measuring BT:

I type

Characteristics:

• There is a stable increase in BBT in the second phase of the cycle by at least 0.4 °C.
• There is a preovulatory and premenstrual decrease in BBT.

Such a schedule corresponds to a normal two-phase menstrual cycle (it was discussed in detail above).

II type

Characteristics:

• There is a slight increase in BBT in the second phase of the cycle: no more than 0.2-0.3 °C.
• The duration of the second phase is 12-14 days.
• There is a slight preovulatory and premenstrual decrease in BBT.

Such a schedule indicates estrogen-progesterone deficiency and requires a mandatory examination by a doctor. It is necessary to assess the level of major hormones in each phase of the cycle and find out the reason for such changes. Similar state often leads to infertility.

III type

Characteristics:

• There is an increase in BBT in the second phase of the cycle shortly before the onset of menstruation by 0.4 °C.
• The second phase lasts less than 10 days.
• There is no premenstrual decrease in BBT.

Such a graph indicates insufficiency of the second phase of the cycle (luteal insufficiency) and indicates low level progesterone (absolute or relative with high concentration estrogen).

Possible reasons for the insufficiency of the second phase:

• Ovarian pathology: resistant or depleted ovary syndrome, ovarian hyperinhibition syndrome, polycystic ovaries, etc.
• Diseases of the thyroid gland.
• Pathology of the pituitary gland: hyperprolactinemia, pituitary hypogonadism.
• Organic diseases of the genital organs: endometriosis, endometrial hyperplasia, uterine fibroids, polyps, tumors.
• Inflammatory diseases of the uterus and appendages: endometritis, salpingo-oophoritis.
• Pathology of other organs: hepatitis, liver cirrhosis, etc.
• Condition after abortion, curettage of the uterine cavity for other reasons.
• Sudden weight loss ( prolonged fasting, diet, diseases of the digestive tract).
• Strong stress.
• A sharp change in climate, time zones.
• Excessive physical activity.
• Taking narcotic drugs.

Insufficiency of the luteal phase threatens infertility or miscarriage. To correct this condition, it is necessary to find out the cause of the failure. Conducted according to indications hormone therapy. During pregnancy, progesterone supplementation is needed.

IV type

A monotonous curve is noted on the graph: BT remains within 36.1 - 36.7 ° C throughout the entire cycle. There is no ovulation. Such a cycle is considered anovulatory.

The anovulatory cycle is a variant of the norm. It is believed that each healthy woman 1-2 cycles per year can be without ovulation. With age, the number of anovulatory cycles increases. During puberty and with the onset of menopause, most of the cycles pass without ovulation. It is impossible to conceive a child this month.

Frequent anovulatory cycles in women reproductive age is a pathology. The reason may be various endocrine diseases, pathology of the ovaries, etc. For an accurate diagnosis and development of a treatment regimen, a complete examination by a gynecologist-endocrinologist is necessary.

V type

A chaotic temperature curve is observed. The range of indicators does not fit into any of the known options and does not lend itself to any logic. A similar schedule occurs with estrogen deficiency. The onset of pregnancy with estrogen deficiency is a big question.

A single chaotic schedule should not frighten a woman. Such a failure can occur during stress, climate change, exacerbation of various extragenital diseases. If the schedule returns to normal in the future, no treatment is required. A chaotic temperature curve for two or more months requires a mandatory examination by a specialist.

Measuring your basal temperature is simple and available method assessing the state of women's reproductive sphere. Regular scheduling helps to predict the onset of ovulation and menstruation, detect pregnancy early and detect menstrual irregularities. Determining the level of basal temperature is practiced in the diagnosis of endocrine infertility and other gynecological diseases.

Basal body temperature (BBT) shows a woman when pregnancy and ovulation can occur. They measure it in a certain way: early in the morning, just waking up, at rest. Any thermometer is suitable for measurements, the time required is 3-6 minutes. Everything is simple, and the results clarify many points.

What is basal temperature and how to measure it

BBT is body temperature, which is measured in the rectum early in the morning, without getting out of bed. This will allow you to find out whether ovulation or egg maturation is currently taking place, on which days conception is possible. The basal temperature will indicate fast offensive menstruation, changes in the cycle, will help in planning and detecting pregnancy or diagnosing some gynecological problems in the body.

How to measure basal temperature at home:

1. It is necessary to measure BBT from the first day of the arrival of menstruation.
2. The thermometer should be placed in the rectum, not in the vagina. The rectal method gives accurate data.
3. The device should be held for 3 minutes.
4. Measurements must be taken daily for 2-3 months at one hour.
5. It is better to do it in the morning, after waking up, right in bed. BBT may differ by 1 degree if you measured it in the evening.

Why you need to measure basal temperature

When menses come hormonal background women undergoing change. The increase in the amount of progesterone is immediately displayed in numbers on the thermometer:

• When the egg matures high level estrogen), BTT is low.
• After this phase, it rises again.
• On average, an increase in thermometer readings reaches 0.4-0.8 degrees Celsius and indicates that ovulation has occurred.

The days before and during ovulation are favorable for conception. You need to know how to correctly measure basal temperature to determine ovulation. It is important to first clarify all the points for yourself in order to keep a schedule, entering indicators into it with the necessary regularity. Such records will help the doctor to get a picture of what is happening, and over time, the woman herself will understand the numbers.

How to measure basal temperature to determine pregnancy

How to measure basal temperature to determine pregnancy? The measurement should be made during the period of maximum rest, which is sleep. Since this is impossible, you need to get as close to the ideal as possible and measure it early in the morning when you are extremely calm. It makes no sense to find out the data if you are taking hormonal drugs or antidepressants, and also while drinking alcohol.

What thermometer to measure basal temperature

There are three types of thermometers for these purposes: electronic, mercury and infrared. The latter are least suitable for such a measurement. With mercury, you should be extremely careful, because during the measurement early in the morning, being sleepy, you can break it. It is unacceptable to change the measuring device, otherwise errors cannot be avoided. Do you want to use a regular thermometer or change it to a more advanced one? No problem, but choose the device for a long time.

How to measure basal temperature with a mercury thermometer

Accurate data can be obtained with mercury thermometer, but even in this case it is possible to measure incorrectly. The thermometer can be entered incorrectly or removed too quickly. Given the danger of mercury, this type of thermometer is less commonly used. How to measure basal temperature ordinary thermometer:

• the tip of the thermometer can be lubricated regular oil(vegetable) or petroleum jelly;
• then gently insert the device into the anus;
• wait 5 minutes, lying with your eyes closed in a state close to sleep.

How to measure basal temperature to determine ovulation with a digital thermometer

Electronic devices are easy to use, but have a bad reputation because they are considered not to measure accurately enough. To achieve the desired result, follow the instructions: so, using oral method close your mouth as tightly as possible so that the thermometer does not show a value less than it actually is. As a rule, the end of the measurement is indicated by a sound signal.

The greatest advantage of such devices (and the reason for the recommendations of doctors) is their safety:

• If you are in sleepy state, drop it or it will break in your hands, it will not cause you any harm.
• The flexible tip makes the instruments comfortable to use, they are waterproof and take measurements faster.

How long does it take to take a temperature

Regardless of the method you choose, the time for this process will remain the same. How to measure basal temperature correctly? It's simple:

1. The thermometer lasts 5-7 minutes. All this time you should remain motionless.
2. The thermometer itself must be prepared in advance and placed near the bed so that in the morning you do not make any unnecessary movements that could affect the data.
3. The time when the temperature will be measured must be observed to the nearest quarter of an hour.

Rules for measuring basal temperature for charting

How to measure the basal temperature, so as not to be mistaken when drawing up a schedule? The main thing is accuracy, it must be measured at the same time. If you violated this rule, then you should start measuring again as soon as the next menstrual cycle occurs. The results should be recorded in a table for the convenience of subsequent identification of dependencies, and everything that can change the indicators should be noted there. You cannot change the type of thermometer if you want accurate data, but you need to write them down right away.

Video: how to measure basal temperature