Basal body temperature before menstruation. Basal temperature is normal in early pregnancy

Basal schedule allows you to observe the normal course of processes in the female body. Today we will consider the question of what basal temperature before menstruation and what values are typical for the functioning of the reproductive system on different stages cycle, and especially before the start critical days.

Features of measurements

What can you find out using a basal temperature chart?

Any woman, upon reaching puberty, dreams of having an ideal cyclic process, knowing the time of ovulation, in order to become pregnant as planned or, conversely, to prevent unwanted conception. For this purpose, along with ovulation tests and other methods, rectal temperature measurement is widely used. That is why the question of what is the normal basal temperature before menstruation, what should it be during the release of the cell and the standards for both phases is very relevant in the lives of girls. Using a graph you can identify the following points:

whether the follicle is maturing;
day of ovulation;
hormonal imbalance;
day of future menstruation;
onset of pregnancy.

What is the basal temperature before menstruation (normal)

Before determining what the basal temperature before menstruation is normal in your cycle, let us remind you that measurements should be taken for at least 3-4 months to ensure the reliability of the values obtained and certain rules should be followed:

Measurement time 5-7 minutes mercury thermometer or 1 minute - electronic;
Use the same thermometer, shaking it off in the evening;

Do the procedure in the morning, immediately after 6 o’clock good sleep without getting out of bed and without making sudden movements, preferably at the same time;
Enter the data into a graph, under which note the slightest deviations in in the usual way life (colds, stress, physical strain, alcohol consumption, etc.).

Temperature standards at different stages

The study must begin on the first day of menstruation. Values during this period are elevated and therefore are not taken into account. Average temperature on the last day of menstruation it will be about 36.3° and, fluctuating within the range of up to 36.5°, lasts throughout the first phase. This is the most favorable conditions for follicle growth under the influence of estrogen.

On the eve of the release of a mature egg from the ovary, it decreases by a few tenths of a degree, and then increases to 37° and higher, which confirms the fact of ovulation and the beginning of the second phase. Such values are typical almost until the end of the cycle.

What basal temperature will be before menstruation depends on the behavior of the egg: fertilization will occur or not. After the follicle breaks through, a formation forms on the wall of the ovary at the site of the wound. corpus luteum, which produces the hormone progesterone. It is responsible for fertilization and preparing the uterus to receive the fertilized egg, and increases temperature readings to 37.0-37.5°. These values are the most optimal for the development of pregnancy.

What is the basal temperature before menstruation per week?

A standard graph of temperature values over this period will stably record these numbers. If conception has taken place, a similar picture continues before and after the delay, which is the first sign of pregnancy, which will be confirmed by other symptoms and positive result test.

Answering the question of what basal temperature will be recorded before menstruation a week before their onset, the answer is clear: 37° and above, but not more than 37.5°. Although at 28 daily cycle It is at this time that implantation retraction can be seen on the graph. It lasts for a day, and a decrease in thermometer readings is observed by several tenths of a degree. Sometimes it is accompanied by barely noticeable pain in the lower abdomen and slight bleeding from the vagina. They notify expectant mother about the implantation of the embryo into the endometrial wall. However, then the indicators level out and become the same. Moreover, this phenomenon is not observed in all women.

If conception does not occur, progesterone levels gradually decrease, which leads to a decrease in temperature on the eve of menstruation.

What is the basal temperature before menstruation 3 days

What the basal temperature will be before menstruation (3 days in advance) depends on the individuality of each representative of the fair sex. Statistics indicate a decrease of 0.3-0.5°. Values in the range of 36.8-37.1° at this moment are considered standard.

When asked what the basal temperature will be before menstruation (3 days in advance), gynecologists answer that the average temperature will be 36.8-37.1°.

Atypical temperatures

There are possible deviations from the norm due to disease or hormone imbalance, which is expressed in other indicators on the graph. The most typical examples of deviations:

Progesterone deficiency

Progesterone deficiency, causing a tendency towards the downward curve of the graph. It is characterized by a slow rise in temperature, which lasts no more than a week. The difference in digital values between the phases becomes less than 0.4°, the second period of the cycle is shortened to 10 days instead of 14, which causes menstruation to appear prematurely;

Endometritis

Endometritis, inflammation of the uterine mucosa, on the contrary, increases the temperature in the first menstrual days up to 37°. This is what the basal temperature is before menstruation and on the first day of bleeding business card of this disease. When, after a slight decrease before the start, instead of continuing to drop, an increase in indicators is observed, it is clear that you cannot do without consulting a doctor;

The basal temperature before menstruation and on the first day, if there is an inflammatory process such as endometritis, is kept at 37°.

Pregnancy

When pregnancy is confirmed, when the temperature remains elevated - up to 37.5°, menstruation does not begin on time, and there is bleeding from the vagina, indicating a threat of miscarriage. At negative test and high temperature, development is possible ectopic pregnancy;

Lack of ovulation

Lack of ovulation, when the resulting graph is a set of chaotic points, sometimes high, sometimes low, without a clear boundary between the phases;

Inflammation of the appendages

Inflammation of the appendages increases the thermometer readings, both in the first period of the cyclic process and in the second. In the first half of the graph, an increase to 37° is recorded, followed by a decrease. In the second, what basal temperature before menstruation will be 2 days later, the same remains the same further, reaching a value of 38 °.

In the second cycle, with inflammation of the appendages, the basal temperature before menstruation will remain at 38 °.

Conclusion

You should know that when taking oral contraceptives You shouldn’t wonder what your basal temperature is before your period. Drink hormonal pills distorts the thermometer readings, and the resulting graph will be uninformative.

Basal temperature is an important indicator that can visually display a woman’s condition. Temperature should be measured in strict compliance with all recommendations.

Every woman who closely monitors her health should know that her body is completely controlled by hormones , capable of influencinghuman temperature. Having learned to measure it, you can accurately count important days. It should be measured every day, only then will it be possible to create a cyclic calendar; it can be used well in the following cases:

when the time is right for successful conception
conception
determination of gynecological inflammation
talk about hormonal imbalance
talk about imminent arrival menses

Placing a thermometer and measuring in the armpits will be ineffective. It is best to measure rectal temperature with a simple electronic pharmacy thermometer and only on the mucous membranes of the body.

The temperature in the intestines should be measured in a supine position immediately after waking up, without even getting out of bed. For this reason, the thermometer should be prepared in advance and placed next to the bed. An electronic thermometer will determine the temperature in seconds.

Basal temperature during pregnancy

If fertilization has occurred, the temperature level will have slightly different values. Rectal temperature in the early stages serves as a unique way diagnosing conception
If you are completely sure that pregnancy has occurred, then the rectal temperature decreases from the mark 37 indicates any threats of disruption
Do not assume that measuring the temperature level is - grueling task. After all, not every woman needs to do this regularly. Temperature should be measured for those who have repeatedly faced threats and miscarriages in their lives

Normal basal temperature before menstruation

Remember that taking medications, drinking alcohol the night before or not healthy condition capable of changing body temperature.

temperature chart before menstruation

Before menstruation, a change in temperature occurs in the female body. This can be observed by noticing a slight increase from 36.6 to 37.6 maximum (that is, by one degree). This temperature may be accompanied by some sensations:

breast tenderness
headache
nervousness and irritability

The days preceding your period are characterized by elevated temperatures and these days are the most unfavorable for conception. You can have unprotected sex due to your low chance of getting pregnant.

measurement in the morning

Remember that basal temperature should be measured while lying down. Any activity can disrupt it and mislead you.

If you measure your basal temperature for several months in a row, you can accurately study the characteristics of your body and know exactly the days preceding the menstrual cycle.

When does basal temperature fall and rise before menstruation?

Basal temperature is a proven gynecological method that has been successfully used for decades and hundreds of years. Women's hormonal background (sex hormones) influence how the temperature changes with the arrival of each stage of the cycle. Especially important the temperature acquires before the onset of critical days.

Temperature data can provide a lot of information to doctors, and to the woman herself, about what is happening to her body. For example, this way you can determine the time of release of the egg - the most favorable time for conception or even the pregnancy itself. It is not uncommon for the temperature to “scream” about the presence inflammatory process or illness. But most often, or rather every month, she warns us about the approach of menstruation.

normal temperature level

As detailed observation of the female body shows, the body temperature before the onset of menstruation is normally slightly less than the rectal temperature (the one measured rectally). This temperature can vary completely, but its value ranges from 36.7 degrees to 37.6 degrees. Before the onset of menstruation, you may notice how it becomes a little lower. This happens a couple of days before the discharge starts
During discharge, a temperature of 37 degrees is considered optimal. This is considered the most acceptable indicator and speaks of the normal course of the cycle. But you don’t always need to focus only on a value measured just once. Here you need to keep a detailed table of measurements every day and strictly take into account all phases, where it is easy to notice the difference in other phases
If before critical days the temperature rises - this normal phenomenon, because this is the body’s reaction to natural process. It is very easy to understand why this happens. During ovulation, an excessive amount of progesterone, the female main hormone, accumulates in the female body. It is this hormone that can influence the temperature center. which is located in the brain
Commands come from the center of the brain that the temperature should be increased. This happens about a week before the onset of menstruation itself and only a couple of days (about two) before the onset bleeding- the temperature drops significantly. During menstruation, the temperature normalizes

Basal temperature charts before menstruation

First of all, before you start measuring your basal temperature, you should understand how to do it correctly:

the thermometer should be at an accessible distance so that you can get it without getting out of bed
you can measure temperature electronic thermometer(this will be easier and more accurate) or mercury
the tip of the thermometer should be lubricated with baby cream, after which the thermometer is inserted into the anus no deeper than two or three centimeters
The electronic thermometer itself gives you a signal that the value has been determined; the mercury thermometer must be kept in you for about five or even seven minutes
you should not make any movements: walk, bend over, squat - this provokes blood flow and the results may not be correct

normal course cycle

Based on this table, you can clearly see how the temperature changes over the course of the cycle. During menstruation, the basal temperature stabilizes to an acceptable state of 36.6 or 36.7. After this, a decline sets in, which can fluctuate within one degree every day.

Before ovulation, the basal temperature reaches its minimum value and remains there for two to three days. After this, the egg provokes a sharp release of progesterone and the temperature rises significantly, rising to 37, 37.1, 37.2 degrees. This temperature is maintained for ten to fourteen days and only then begins to decline again before the onset of a new cycle.

cycle without releasing an egg

Basal temperature charts during pregnancy

Ovulation is maintained for two to three days and is maintained throughout this time minimum temperature. After the egg is released, it triggers the release of the hormone progesterone into the body. It is the saturation of progesterone that maintains and raises the temperature
The following days after the release of the egg are the most favorable for fertilization. You can see how the temperature level gradually increases. However, on a day when the temperature dropped sharply and the next day it rose sharply. fertilization most likely occurred
After this jump, you can notice a significant increase in temperature, which in some cases can reach 38 degrees. It all depends on individual characteristics woman's body and health
37.2 is the temperature that indicates pregnancy

Measuring basal temperature will allow a woman to determine how smoothly her body works, determine the exact onset of ovulation for favorable conception and correctly calculate the days on which you can have “unprotected” sex.

Of course the most exact values measurements can be obtained only when the temperature is measured several cycles in a row.

It's normal when the temperature female body fluctuates at minimum values. The female body is controlled by hormones and they are responsible for the decline and rise of thermometer marks. Before menstruation, the temperature, which rose to its minimum values, begins to decline. this is unchanged and it only means that discharge will begin soon.

IN in good condition it reaches 37, 37.1, 37.2 and even 37.5 degrees. It just depends on how it's structured female body. Be careful, an increase in temperature from 36 degrees to 37 degrees and above should be achieved only when the second half of the cycle begins.

What does a basal temperature of 38 before menstruation mean?

It is possible that before the onset of your critical days, you may experience an increased basal temperature. This may symbolize the presence of any disorders or diseases in the body.

First, check yourself for any inflammatory diseases in the body. They provoke an increase in body temperature in general. If the temperature was observed for only one day. Most likely it was ovulation.

elevated temperature level

A basal temperature that remains between 37.1 and 37.5 before the expected discharge and does not subside indicates pregnancy. Please note high temperature at 38 degrees, which is maintained for more than one day, indicates the presence of disease and inflammation.

Before taking your temperature, pay attention to the following factors:

sex that occurred at least six hours before taking your temperature
Not calm state, getting out of bed and moving
alcoholic drinks drunk the day before
taking medications
small and very short sleep

All these factors cause incorrect and incorrect temperature measurements. Movement and sex increase blood circulation in the pelvic organs and provoke an increase in temperature.

If you notice a temperature of 36.9 in the first and second cycle, most likely this indicates that the egg is simply not ripe this month. There is no need to panic here, since ovulation may not occur for several months of the year. However, if you observe this frequency over a long period of time, you should consult a doctor.

Video: " Basal temperature during pregnancy, before menstruation, during ovulation, measure basal temperature"

Measurement Rules

To use BT as an informative indicator, you need to observe temperature fluctuations over several menstrual cycles, at least three. Measurement Rules:

It is better to measure temperature rectally - this way the influence of air temperature is less;
carry out the procedure every morning, including menstruation days;
Before thermometry, you cannot get up and engage in any activity, so it is recommended to knock down the thermometer and leave it by the bed in the evening, when preparing for bed;
the indicators are recorded in a notebook, and at the end of each cycle a graph is drawn (one scale is the day of the cycle, the second is the thermometer readings on that day);
thermometry time - 10 minutes;
It is advisable to wake up at the same time every day;
sleep before measuring BT should last at least 6 hours;
Lack of sleep, alcohol abuse, taking medications, and colds can cause an increase in basal temperature, so these factors should be avoided.

As you can see, the method requires high motivation and discipline. However, if you broke a rule, please indicate this in a note for the relevant day. If on this day the readings deviate significantly from the curve of the graph, they are not taken into account.

BT in the first phase of the cycle

First phase menstrual cycle called follicular, or menstrual.

The first day of the cycle is considered the first day of menstrual bleeding. Typically, the temperature in the follicular phase is low, less than 37C in the rectum.

The duration of the phase is about 14 days. The end of the first phase corresponds to the moment the egg leaves the follicle - ovulation. Before ovulation, BT normally decreases, and after it increases, which is due to the production of the hormone progesterone by the corpus luteum. The corpus luteum forms at the site of the ruptured follicle and produces progesterone within 10-12 days.

BT in the second phase of the cycle

From the moment of ovulation, the luteal phase begins, also known as the corpus luteum phase. It lasts as long as the corpus luteum remains active (12-14 days).

BBT increases after ovulation, remaining at a level approximately 0.4 C higher than before ovulation for about 10 days. The corpus luteum gradually degrades and progesterone levels drop. At this stage, there are 2 possible scenarios:

1. If fertilization does not occur during the existence of the egg, that is, the woman does not become pregnant, BT decreases, and after a few days menstruation begins, and the cycle begins from the beginning.

2. If fertilization has occurred, the basal temperature rises in the period before menstruation; after this BT continues to hold on elevated level(about 37 C), and menstrual bleeding doesn't come.

Changes in BT during pregnancy

An increase in basal temperature during pregnancy occurs due to the work of the placenta. The placenta, the tissue connecting the mother and fetus, produces progesterone. Thus, although the corpus luteum is no longer active, the high temperature is maintained due to the activity of progesterone in the placenta.

Progesterone continues to be synthesized throughout almost the entire period of pregnancy, but usually the mother’s body quickly adapts to this hormonal background, and body temperature drops to normal values.

Thus, if a temperature of 37 C rises before menstruation, and then menstruation is delayed, pregnancy can be suspected. However, the fact that body temperature rises before menstruation is not sufficient to confirm the presence of pregnancy.

It should be noted that when analyzing BT, more important role It is the difference in temperatures before, during, and after ovulation that plays a role, not the number on the thermometer on the day before your period.

That is, if the temperature before menstruation is 36.9 C, and before ovulation it was 36.7 C, this is less likely to indicate pregnancy than a reading of 36.6 C before menstruation in a woman who is characterized by a decrease in readings before ovulation up to 36.1 C.

In the first case, the difference is 0.2 C, and in the second - 0.5 C. That is why BT can be considered as diagnostic sign only if the woman monitors her constantly over several cycles.

Factors that increase temperature

Let's talk about factors that can cause an increase in basal temperature in the second phase of the cycle, and, in fact, before menstruation.

An increase in basal temperature may also have external reasons, not related to hormonal levels:

Inflammatory processes in the body - viral or bacterial infection, the presence of a focus of inflammation (boil, abscess). Symptoms may be mild, especially if the infection is in initial stage or has a sluggish character.
Gynecological problems.
For example, in women with endometriosis (inflammation of the uterine mucosa), the body temperature rises before menstruation and is usually 37.0-37.3 C.
In some cases, the temperature rises with severe allergic reactions.
Influence external factors listed in the list of restrictions during the BT measurement period. These include alcohol consumption, stress, severe physical activity and overwork, active sex, medication use.

Thus, elevated temperature body a few days before menstruation is not a reliable sign of pregnancy.

BT is a good way to monitor the functioning of a woman’s reproductive system;
the method helps to identify hormonal disorders;
fluctuations in BT throughout the cycle are caused by the work of the corpus luteum, which produces progesterone;
Normally, in the absence of pregnancy, 2 drops in temperature are observed during the cycle - before ovulation and before menstruation;
the highest BT is achieved on the day of ovulation, when the egg ruptures the follicle;
the absence of fluctuations in the schedule usually indicates the absence of ovulation;
during pregnancy, BT increases and may remain at an elevated level for several months;
the absence of a premenstrual decrease in BT is not a reliable sign of pregnancy.

Monitoring changes in basal body temperature (BBT) is used by women as the simplest and most informative method condition assessments women's health. It is especially widespread among women planning pregnancy. Correct and regular measurements allow you to determine the day of ovulation, which significantly increases the likelihood of conception.

Let's determine the normal BBT indicators before menstruation

Basal temperature values vary throughout the menstrual cycle.

Its fluctuations are caused by changes in the concentration levels of certain hormones in different phases:

Menstrual phase. Starts from day one bloody discharge, on average lasts up to five to seven days. It is characteristic of her low level main female hormones.
Follicular phase. Counted from day one menstrual flow, lasts about twelve days. At this stage, follicles grow, and one or more of them stand out in size and contain a mature egg. This growth is provided by follicle stimulating hormone (FSH). In addition, the level of estrogen increases, and it is under its influence that the egg matures. Peak hormone production occurs on the day before ovulation.
Ovulatory phase. It begins approximately in the middle of the cycle and lasts about three days. Sharp rise estrogen levels contribute to a surge in luteinizing hormone (LH) – a harbinger of ovulation, FSH level at the same time it decreases. The mature egg is released from the follicle, and the follicle itself becomes the site of growth of the corpus luteum - a temporary gland that produces progesterone.
Luteal phase. Its duration is on average sixteen days. It is characterized by an increase in the level of progesterone, a hormone that supports pregnancy. If pregnancy does not occur in a given cycle, then by the end of the phase the activity of the corpus luteum fades, the level of hormones decreases and menstruation begins - the beginning of a new cycle.

As a rule, BT tends to decrease in the follicular phase and increase in values after ovulation. Temperature 37-37.2°C. is the norm for the luteal phase, and if pregnancy occurs, then high values maintain until postpartum menstruation.

What should be the basal temperature or abbreviated BT before menstruation? Many women dream of a regular menstrual cycle, since this is one of the main signs proper operation reproductive system. One of important indicators is BT. Its daily measurement allows you to monitor the condition of the body, determine the approaching ovulation and the beginning of a new menstrual cycle. Let's consider the features of testing and interpretation of BT measurement results.

BT - indicators that were obtained using a thermometer in oral cavity, vagina or rectally, in anus. Basal temperature during, before, and after menstruation changes.

Promotion or Demotion this indicator temperatures are determined by the difference in the phases of the monthly cycle:

follicular – the phase of egg maturation, the bt level will decrease;
ovulation – fertile phase, during which conception may occur;
luteal – the phase of the onset of menstruation, when all hormones fall, BT decreases.

During all these phases, the level of hormones in a woman’s body is different. Estrogen and progesterone, which are regularly released by the body, influence changes in BT. And it is precisely on the change in BT that one of the most reliable methods of contraception is built - the calendar method.

Measurement Rules

So, a graph of basal (oral or rectal) temperature is very important, because, relying on the data obtained, the doctor will be able to see a picture of the woman’s health status and determine whether there are changes in the functioning of the reproductive system or not.

There are a number of rules for measuring temperature, following which it is possible to obtain the most accurate results:

Temperature measurements must always be taken at the same time of day. Most reliable results can be obtained by measuring BT in the morning immediately after waking up. Minor deviations in time are allowed - +/- 30 minutes will not negatively affect the readings. Perfect timing The period for carrying out the procedure is considered to be from 6 to 8 am. In this case, it is very important that before measuring the BT is healthy sleep for at least 4 hours.
Basal or, in other words, rectal temperature during menstruation is always measured with the same thermometer. If it breaks or no longer shows the correct values and the thermometer had to be replaced, then this must be noted in your notebook, where the readings are recorded.
It is recommended to prepare the thermometer in advance by placing it near the bed. And measure it without getting out of bed.
The duration of the procedure depends on the measurement method, but on average it takes at least 5 minutes.
To track the dynamics of changes in BT, it is necessary to maintain a special chart, where all indicators for the day, week, month, etc. are indicated.

BT during menstruation

Research should begin recording from the first day of menstruation. What should the BT be before menstruation, for example a week before menstruation? Indications during this period may be elevated, so this fact can be ignored. But on the last day of menstruation, the BT indicator will be about 36.3°C and can fluctuate up to 36.5°C. These are the most favorable conditions for the full development of follicles.

What BT before menstruation depends on the behavior of the egg: whether conception has occurred or not. When the egg leaves the follicle, a corpus luteum forms at the site of the rupture of the vesicle, which produces hormones to prepare the uterus for implantation of the embryo if fertilization has occurred. And it is this gland that stimulates the increase in BT on the first day of delay in order to improve the conditions in the uterus for more comfortable development of the embryo.

BT a week before period

During this period, indicators will fluctuate between 37-37.5°C. At the same time, it is worth taking into account such a factor as implantation retraction - when the BT drops for a while and then rises sharply.

If fertilization does not take place during this period, then the level of progesterone gradually decreases, the corpus luteum begins to fade, which leads to a decrease in temperature.

BT 3 days before menstruation

What BT will be during menstruation and a few days before it depends on the individual characteristics of each individual woman. According to statistics, on the eve of menstruation, indicators can drop by 0.3-0.5°C. The norm for this phase of the cycle is values in the range from 36.8 to 37.1 ° C.

Reasons for changing BT

There are a number of reasons that affect the increase or decrease in temperature:

Progesterone deficiency. Leads to a decrease in BT indicators. Characteristic feature this pathological condition is a slow rise in temperature that will last no more than 7 days. At the same time, the difference in indicators at different phases of the cycle does not exceed 0.4 ° C, and the duration of the second period is reduced to 10 days, which, in turn, stimulates the earlier onset of menstruation.
Endometritis. This disease is characterized by an increase in basal temperature before menstruation – 37°C. This BT lasts until the end of menstruation. And when before menstruation there is a decrease in BT, then in the case of endometritis these values decrease only by a few tenths of degrees, after which they begin to rise upward.
Onset of pregnancy. If there is a delay and the temperature in the vagina or anus reaches 37°C, but not higher than 37.5°C, then most likely a child has been conceived. If the rapid pregnancy test did not show 2 stripes, then it is possible we're talking about O late implantation or pathologies - ectopic pregnancy or anembryonia.
The onset of the anovulatory phase. A chaotic increase and decrease in BT levels may indicate a lack of ovulation. At the same time, the basal temperature graph does not have a clear boundary and highest point.
Presence of inflammatory gynecological diseases. In case of inflammation of the ovaries, the thermometer records values at 37°C, which will be observed in the first and second periods. In this case, before menstruation, BT will decrease, after which it will rise again, but to 38°C.

Also, uncharacteristic readings of basal temperature can be observed due to failures in hormonal background and for disorders of the thyroid gland.

Conclusion

At the end of the publication, let's summarize:

BT is proven gynecological method monitoring the health of a woman’s reproductive system. The values of basal or rectal temperature are especially important after menstruation and before critical days, ovulation; more precisely, the dynamics of their growth and decline are important.
Using the BT schedule, it is possible to determine the approach of ovulation and menstruation, to find out whether there are any deviations in the functioning of the organs of the reproductive system. Very often sharp jumps temperatures indicate the presence of an inflammatory process or disease.
There are certain BT standards, deviations from which are characterized by obvious changes in the functioning of the organs of the genitourinary or reproductive system.

It is also worth considering that during oral contraceptives, BT indicators “jump”, so you should not rely on their reliability.

Have you ever checked rectal temperature? Do you or someone you know keep such a calendar to track the fertile phase and the approach of menstruation?