How to make a basal temperature chart. Normal for ovulation. Daily fluctuations in BT

How is it changing basal body temperature during the cycle? Why does BBT fluctuate throughout the day? When does basal body temperature increase? In this article, you will find answers to these and other important questions.

Measuring basal temperature is the easiest way to calculate optimal days to conceive a child. Measurements throughout the cycle will help determine the level of hormone production, track the process of egg maturation. Via this method you can find out about pregnancy early dates.

Basal body temperature varies by day of the cycle, so you need to take measurements every day at the same time and record the data in a graph. At the same time, it is important to know what the basal temperature should be at the beginning and in the middle of the cycle and what indications are considered optimal in the last phase.

The BT norm is relative value. Indicators vary depending on the individual characteristics of the organism.

Even if the norm was observed during the entire cycle, then it should be borne in mind that the basal temperature plays an indirect role: it is not the indicators that are important, but the temperature difference between the two phases of the cycle. Normally, it should be at least 0.4 ° C.

How does basal body temperature change throughout the day?

During the day, the basal temperature changes, and the difference in values \u200b\u200bcan be significant. The basal temperature during the day is usually higher than in the morning. Daily measurements can reach the maximum possible. During the day, the main processes take place in the body, active phase during which all organs are involved.

In the morning and in the evening, the activity of the body is low, so many believe that the readings of BT during these periods should be the same. Actually it is not. Morning readings and evening readings differ within one degree. For the BT schedule, this difference is significant. Why is the basal temperature in the evening, when the body is at rest, higher than in the morning? In evening time biological processes in the body begin to slow down, whereas in the morning they have not yet started. Because of this, there is a temperature difference, although it seems that the readings in the morning and in the evening at rest should be identical.

BT is the resting temperature, so you need to measure it for the chart in the morning, after six hours of uninterrupted sleep. It is on the morning readings that doctors are guided.

Basal temperature in the first phase of the cycle

In the first phase of the cycle, the average basal temperature is 36.6, the norm during this period ranges from 36.7 - 36.8. You can start measuring BBT on any day of the cycle. However, to create an accurate schedule, it is required that the basal temperature be measured at the very beginning of the cycle, that is, on the first day of menstruation. In the first phase, jumps in basal temperature can be observed. Jumps are of three types:

Stepped. A sharp change in temperature upwards. The high temperature is observed during three days, and then the jump occurs again.
Gradual. Every day the temperature increases by 0.1 degrees.
Return lift. First, there is an increase in temperature, the next day it falls below the dividing line, after which it rises again.

High basal temperature in the first phase of the cycle

In the first phase of the cycle, an increased basal temperature may be observed. If all measurements were carried out correctly, then this is a signal to consult a doctor. In the body, inflammatory processes can take place.

Why does a high basal temperature appear in the first phase if everything is fine with health? The reasons for the high temperature during this period may be different. Most often, an increase is observed after stressful situations, drinking alcohol, sleepless night. Also, with morning measurements, you can observe a high temperature if there was sexual contact late at night. If your sleep lasted less than six hours, then most likely you will see an "unusual" temperature on the thermometer. In order to exclude indications obtained in non-standard situations, only correct temperature data should be connected with a dotted line in the graph. It is also important to note possible cause increase in BT.

Low basal temperature in the first phase of the cycle

In the first phase, low BBT is the norm. Before the ovulation rise, there is often a decrease in temperature by 0.1 - 0.2 degrees. If the cycle lasts 28 days, then in the first phase, BT begins to gradually increase. On the 12th day, one can observe sudden jump temperature down. This is - natural process which is called preovular retraction. If the low basal temperature lasts the entire cycle, then you need to see a doctor. In the second phase, it is extremely important that BT rises.

Basal temperature in the second phase of the cycle

The second phase of the cycle is the period after the release of the egg from the follicle. In the second phase, the basal temperature should be on average 37 degrees, but the norm may be higher, because the readings also depend on the method of measurement. What basal temperature is considered normal in the second half of the cycle? Within the normal range, BT is considered from 37.2 to 37.3, however, in some cases there may be minor amendments, taking into account the individual characteristics of the organism. If in the second phase the basal temperature does not rise in relation to the temperature of the first phase, then it is worth making an appointment with a gynecologist. This may indicate violations in the work of the genital organs.

If in the second phase there is a sharp jump in basal temperature, then this should alert you. When the basal temperature in the second phase jumps uncharacteristically, this may indicate a lack of estrogen or inflammation of the appendages. With jumps, the date of ovulation will be difficult to determine.

In the second phase of the cycle, basal temperature is an indicator of problems. If at the end of the cycle your basal temperature does not match the norm, then this may indicate a pathology of the reproductive system.

High basal temperature in the second phase of the cycle

If an increased basal temperature is observed in the second phase, then this is a signal to go to the gynecologist. According to the BT of the second cycle, both health problems (cyst, inflammation) and pregnancy are determined. Pregnancy is indicated by high BBT, which lasts more than two weeks. During pregnancy heat accompanied by a delay in menstruation. In any case, you need to consult a doctor, as measurements can be erroneous, especially if you are making a chart for the first time.

Low basal temperature in the second phase of the cycle

Why is there a low basal temperature in the second phase? If during this period average temperature does not reach 36.8 degrees, then this indicates various problems. Low BT of the second phase is observed with:

insufficiency of the yellow body;
estrogen-progesterone deficiency.

If in the second phase of the cycle there is a drop in basal temperature, that is, its sharp decrease, this is a sign of pregnancy. Implantation retraction is observed only for one day: BT decreases to the level of the midline.

When the basal body temperature rises

Increased basal temperature: what does it mean? Why does basal temperature rise in different periods? Let's figure it out. An increase in BBT is most often a sign of pregnancy. Determine what is happening in your body new life possible if:

high BBT lasts three days more than the corpus luteum phase;
if the increase is observed for more than 18 days in a row;
if a third temperature jump occurs in a two-phase graph.

A normal pregnancy is accompanied by a high BBT (37.1 - 37.3) in the period from conception to 20 weeks. After four months, the temperature gradually decreases, the need for measurements disappears.

High BBT does not always indicate that conception has taken place. In what other cases does basal temperature usually increase? The reasons due to which the increase in basal temperature took place in a two-phase cycle may lie in physiological features organism. An uncharacteristic increase in temperature is observed in pathologies of the genital organs.

High basal temperature, and the test is negative

Often there are situations when the basal temperature is elevated, and the test is negative. Only a doctor can tell if pregnancy has occurred in this case. Sometimes tests fail and do not determine pregnancy in the early stages. However, the problem of inconsistency between BT and test results may not be in the test: fever may signal disease. A timely visit to the doctor will help solve the health problem (if there really is one), which will speed up the long-awaited pregnancy.

Realizing that there is a new life in her, a woman seeks to learn as much as possible about her situation. This is especially important for those who are anxious for any reason. Basal temperature in early pregnancy will help to monitor the process daily, to identify danger signs so that the expectant mother can get help in a timely manner if necessary.

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Why measure BBT

Basal temperature is another indicator of gynecological health. Due to the natural difference in its values at each stage of the cycle, women are planning a pregnancy. Daily measurements and scheduling make it possible to find out the day of ovulation. Before menstruation, the value of BT reaches 36.7-36.9 degrees. By the time of egg maturation, it increases to 37-37.1. If conception did not occur, after ovulation, its values decrease again. If there was no ovulation at all, then the temperature will be approximately the same throughout the entire cycle.

Basal temperature 37 is a sign of pregnancy, which appears, perhaps, earlier than others. Delayed menstruation, morning sickness and other symptoms will announce it later. In the meantime, keeping BT at this level for 2 weeks will let the woman know that she is now responsible for another life, and it's time to start providing suitable conditions for her development. And although this is not an indisputable sign of pregnancy, it can be an occasion for a test, leaving interfering bad habits, establishing a normal regime.

The norm of basal temperature after conception

A fertilized egg needs special conditions for attaching to the wall. The body creates them with the help of the hormone progesterone, which begins to be produced in an increased amount compared to the previous one. With its help, the uterus prepares to accept the fetal egg, then allow the membranes, the placenta, to develop. For this reason, the basal temperature during early pregnancy also goes up, but up to certain limits.

It usually fluctuates between different women from 37 to 37.3 degrees. Keeping within these limits means that the process goes without unpleasant surprises, as it should. What basal temperature in early pregnancy may depend on the characteristics of a particular organism. It is normally able to deviate from the average values, reaching 38 degrees. But to make sure that this is not evidence of any danger, it is better to visit a specialist.

Daily fluctuations in BT

Measurement of bt in early pregnancy should be carried out at the same hours in the morning. Such indicators can be trusted, since the body has rested, and no external factors have yet been able to influence it. Physical activity inherent in wakefulness, eating, emotions, even wearing clothes inevitably change its meanings. Usually, the basal temperature in early pregnancy rises above 37.3 degrees during the day, but there is no danger hidden in this. At this time, its values can change every hour under the influence of the factors already mentioned.

By the end of the day, the body “digests” everything accumulated during the day, but is already preparing for rest. However, taking measurements at this time of day is just as pointless. The indicator will still be high, and understand why this is natural causes or health problems is not possible. Basal temperature in early pregnancy in the evening is usually about 1 degree above normal. An informative measurement at this time will be if the woman slept for at least 5 hours during the day. But it is unlikely that anyone will observe such a strange regime for all 12 weeks of the initial stage.

When and how to measure BBT

Bt during early pregnancy is measured in the morning before getting up, when the biological activity of the body is minimal. The thermometer is placed in the vagina or rectum for 2 cm and held for 3-5 minutes. During this time, the device will sense and display the actual temperature values.

Each measurement must repeat the previous one. That is, you cannot insert a thermometer into the vagina today, and tomorrow into anus. And it is necessary to carry out manipulations at the same time, you can be late and rush only for an hour. The thermometer should always be the same as before.

Basal temperature is important in early pregnancy in accurate measurement. This is real if:

Do the procedure only horizontal position without turning on its side, without getting up. Sitting in bed, the woman increases the flow of blood to the pelvis. The thermometer will show high values that do not correspond to reality;
Take measurements after at least 5 hours of sleep, only in this way the readings will be correct;
Do not have sex during the entire period of BT control. Sexual activity stimulates its increase. Or at least make sure that the interval between the measurement and the act is at least half a day;
Do not take medication. Most of them will distort the picture, and the indicator may turn out to be significantly higher or lower. normal values. But the basal temperature is controlled in the early stages of pregnancy due to the likely threat to the condition. In this case, there may be no danger, and the number on the thermometer will show what is;
Have breakfast after measurement. Food also affects the value of the indicator;
Do not be sick. Even a slight runny nose can change the value of BT.

Why you need a schedule

A BBT schedule during early pregnancy is necessary if a woman seriously decides to track this indicator. As the fetus develops in the mother's body, different kind changes, mainly associated with hormones. It is not surprising that the basal temperature in the early stages of pregnancy is also unstable, the graph will prove this. It usually looks like this:

On the day of fertilization of the egg, the value balances between 36.4 and 36.7 degrees;
For the next 3-4 days, it rises by 0.1 degrees daily and reaches 37;
For another 2-3 days, the value of the basal temperature remains the same;
On the day of implantation gestational sac in the uterine mucosa, it decreases to 36.5-36.6 degrees;
The next 2-3 days, the values of the indicator gradually go up, reaching 36.8-37 degrees;
For about 2 weeks, the numbers on the thermometer can range from 36.7 to 37.1. But the values should not be lower than those observed on the day of ovulation.

Basal body temperature chart during pregnancy early stages should include not only the numbers of the indicator and the days of the cycle, but also the accompanying circumstances. BBT values can be affected by illness, medication, stress. The attending physician should learn about each of them in order to have a complete picture of the development of pregnancy.

When the basal temperature deviates from the norm

It is worth saying that raising the basal temperature and keeping it at certain values is not at all absolute sign pregnancy. Sometimes it can mean something completely different. But if a woman is convinced by a test that conception has occurred, it is not always necessary for her to control this indicator. Usually the doctor insists on measuring BBT for problems with gestation in the past in order to catch them on early stage. So more opportunities to neutralize negative factors.

Why is the basal temperature too high

An excessive increase in basal temperature is due to the inflammatory process occurring in the body. In most cases, it is associated with the reproductive sphere, but not always.

Another reason for too high BBT may be an ectopic pregnancy. The fetal egg, despite the abnormal localization, develops, which means that progesterone is produced in the usual amount for pregnancy. At the same time, there is an inflammatory process in the body that can increase both body temperature and BBT.

A woman needs to listen to the sensations in the lower abdomen and monitor the discharge. If brown instead of transparent come out, an ultrasound should be done. fallopian tubes and abdominal cavity.

Possible threat of interruption

A decrease in basal temperature in early pregnancy occurs with the threat of its interruption. main reason this in most cases becomes a lack of progesterone. The hormone provides the creation of conditions for the development of the fetal egg: loosening the upper layer of the inner lining of the uterus, fixing the embryo in it.

Thanks to him, the basal temperature also rises in the early stages of pregnancy, 37 is its average value for the first 2 weeks after conception. A lower indicator is a reason to take measures to prevent the rejection of the ovum, which may begin soon. If, in addition, a woman feels pain in her abdomen, notices blood-colored discharge, she needs help immediately.

Frozen pregnancy

Low basal temperature in early pregnancy can also be a sign of fetal fading. This means that the embryo has stopped developing. Why this happens, we can only speculate. But you need to know about such a situation, since the fetus does not always come out on its own. It is necessary to remove it, and the sooner the safer for the woman. In the short run, this is done with vacuum method, and having recovered, after a while you can again plan a pregnancy.

Stopping the development of the embryo is accompanied not only by a decrease in BT, but also by other symptoms, the main of which is the disappearance of other signs of its existence. In a woman, the increase in the mammary glands also stops. In this case, the level of progesterone also falls, because the corpus luteum no longer needs to produce it.

Is there a low BBT during normal pregnancy

The norm of basal temperature in the early stages of pregnancy is rather arbitrary. It is not at all necessary that the body will demonstrate its values as in a textbook. His individual characteristics may turn out to be normal developing pregnancy the indicator will not reach the average for all 12 weeks, when it makes sense to measure it. And low bt during pregnancy in the early stages will not interfere with bearing and giving birth to a healthy child.

The indicator must be monitored and compared over time. If at other times its values \u200b\u200bare also not the same as the norm, you should not take this as a threat to pregnancy. For example, with BT during ovulation less than 36.4, the indicator in the first 2 weeks may not reach the milestone of 37 degrees.

Measurement of basal temperature is useful for the first 3 months, when its values are informative. Beyond that, they don't matter. But in the first trimester, you should not overestimate them. Basal body temperature only takes on meaning in the context of other signs. Therefore, for any discrepancies with the average numbers, you should not worry, but it is better to go to women's consultation to make sure everything is ok.

Basal body temperature (BT) is the most low 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, it is necessary to adhere to certain rules, otherwise the received data may be misinterpreted:

BT is determined only in the rectum. Measurement of temperature under the armpit or in the mouth does not give reliable results.
Measurements are taken in the morning, without getting out of bed, before any physical activity. For convenience, keep a thermometer handy.
Before starting the study, at least 4 hours of restful uninterrupted sleep should pass.
BBT measurement is carried out electronic thermometer- one and the same. You can use a mercury thermometer, but with great care.
The study should take place at approximately the same time of day. Deviations of 30-60 minutes in any direction are allowed.
The study time is at least 5 minutes.
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. For rate menstrual cycle and identify gynecological pathology It is recommended that you measure your basal body 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 corpus luteum forms at the site of the burst follicle. 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

At correct measurement 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 graph indicates estrogen-progesterone deficiency and requires compulsory examination at the doctor's. 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.
Excess physical exercise.
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 a woman in reproductive age is a pathology. The reason may be various endocrine diseases, ovarian pathology, etc. For an accurate diagnosis and development of a treatment regimen, it is necessary full examination at the gynecologist-endocrinologist.

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 assessment of the state of the female reproductive sphere. Regular scheduling helps to predict the onset of ovulation and menstruation, detect pregnancy early and identify menstrual irregularities. Determining the level of basal temperature is practiced in the diagnosis of endocrine infertility and other gynecological diseases.

So, for starters, let's figure out what basal temperature is. Basal temperature (abbreviated as BT) is the body temperature at rest, measured rectally. These measurements are carried out to analyze the hormonal background through changes in tissue reactions of the internal genital organs. Temperature fluctuation effect hormonal causes occur only locally, so measurement of temperature in the armpit or in the mouth is not indicative.

But against the background of a general increase in body temperature due to illness or overheating, naturally, the data obtained by measuring BT is also distorted.

How to measure basal temperature

By itself, the measurement of basal temperature does not give anything. It makes sense to study the trend of its change for at least several months and draw up a graph.

When you receive oral contraceptives Measuring your basal body temperature is meaningless, since its level is regulated by the hormones you take, and not by your own. BBT will be approximately the same throughout the cycle.

Let's move on to the technique: how to measure basal temperature? For reliability, basal temperature should be measured daily at the same time, immediately upon awakening, without getting out of bed and minimizing movement before measurement (after all, the goal is to measure basal temperature in a state of complete rest). Therefore, it is better to prepare a thermometer in the evening, putting it near the bed, so that in the morning it is enough to reach out to it. For this, both a classic mercury thermometer and a digital one are equally suitable. The tip of the thermometer should be inserted into anus and lie still when using mercury thermometer- 5 minutes, if the thermometer is digital - until the beep. In order not to forget, immediately transfer the measurement results to the basal temperature chart. So, now, knowing how to correctly measure the basal temperature, we proceed to the analysis of the data obtained.

basal body temperature chart

It should be built over several monthly cycles, otherwise such measurements will not be indicative. This makes it possible to calculate the day of ovulation in a woman's cycle and determine the period of greatest fertility. This information is needed both for couples planning to conceive a child and for contraception. Although in the latter case, relying only on data obtained from the study of basal temperature is not particularly reliable. Gynecologists advise such a "calendar" method to be supported by other methods of protection.

But if you and your partner want to conceive a child, then it will be useful for you to determine the days when this can be done most likely.

To build a graph, you can use a regular sheet from a squared notebook or graph paper. The number of the day of the cycle is plotted on the horizontal axis (the 1st day is the day of the onset of menstruation), and the exact temperature measurement data is plotted along the vertical axis (with an accuracy of 0.1 0).

The basal temperature chart allows you to:

determine, thus calculate the days most favorable for conception (or "dangerous" days, as adherents call them calendar method contraception);
establish (only a doctor can analyze your data);
find out if pregnancy occurred with or an uncharacteristic appearance of supposedly menstrual flow;
diagnose women's health problems, in particular endometritis.

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