How to find out by basal temperature pregnancy occurred. Is it possible to determine pregnancy before a missed period? But, as a rule, they are the same for everyone ...

23.05.2019

Seeing two long-awaited strips on the test, you begin to carefully monitor any changes that occur in the body.

Basal body temperature during pregnancy early dates reacts to the smallest fluctuations in hormonal system and allows you to calculate deviations from the norm and timely seek help from a antenatal clinic.

What is basal body temperature

The basal or basic temperature (hereinafter referred to as BT) is the one that is practically not affected by the external environment;
You can get its values \u200b\u200bin the morning hours, without getting out of bed, after a full night's sleep;
Measurements are taken using a thermometer placed in the mouth, vagina or rectum;
BBT values are influenced by hormones such as estrogen and progesterone, the level of which varies according to the days of the menstrual cycle.

Know! Obstetrician-gynecologists consider BT an indicator of the health of the female reproductive system. Comparison of charts for several cycles can reveal hormonal disorders, the period of ovulation, as well as inflammatory processes.

Even at the stage of planning a child, BT values \u200b\u200bwill help determine favorable period for conception without the use of expensive tests and ultrasound diagnostics. The only caveat is the strict observance of all norms during the measurements.

Why can you trust your basal body temperature?

The menstrual period consists of two phases.

During the transition from one phase to another, ovulation is observed. The whole essence of the method is to build a graph based on daily BT readings;
The first half of the cycle is characterized by low numbers, and the second half is high, due to the influence of progesterone.

Ovulation on the chart looks like a sharp drop.

The value of BBT about a day before the onset of ovulation drops rapidly, and the next day it also rises sharply. Testimony imminent attack menstruation serve reduced values BBT, but during fertilization in the second phase, they will be steadily increased.

You can use the basal temperature measurement method if:

trying to get pregnant lasts longer than a year;
it is necessary to identify violations in the work of sex hormones;
need to predict good time for conception;
it is necessary to determine the presence of pregnancy before the fact of delayed menstrual bleeding.

How to determine pregnancy by basal temperature?

The entire menstrual period can be tracked on the basal temperature chart. During pregnancy, the picture is significantly different from that which can be seen during a normal cycle.

The very first phase of the female period is follicular (hypothermic). At this time, the formation of the follicle occurs, inside which the egg matures. The first phase is characterized by increased production of estrogen due to the increased work of the ovaries;

Favorable values of BT are from 36.1 to 36.8 degrees. Values at the upper end of the range are usually accompanied by a lack of estrogen. In such cases, doctors recommend appropriate hormone therapy.

The moment of ovulation. The follicle ruptures under the action of LH (luteinizing hormone) and the egg is released, and a hormonal surge occurs. At this stage, BT values increase sharply to 37.0-37.7 degrees;
The last phase is luteal (hyperthermic). Instead of a bursting follicle, a corpus luteum begins to form, which is a source of progesterone.

In the case of fertilization of the egg (during the implantation, the BT decreases) - it enters the uterus. At the same time, the corpus luteum continues to grow, releasing hormones that allow you to maintain pregnancy and prevent uterine contractions;

It is these hormones that make the BBT values stay at the upper limits. The corpus luteum functions until the complete formation of the placenta.

Favorable values of BT are above 37 degrees;
If conception does not occur, the corpus luteum collapses and hormone levels drop. BBT values also decrease and menstrual bleeding occurs.

Temperature is below ovulation

Usually, the value of basal temperature during early pregnancy is 37.1-37.3 degrees.

It happens a little lower, within 36.9 degrees.

You can find this out by recording your basal body temperatures over several cycles.

The only constant sign of the possible fact of pregnancy is the absence of a low basal temperature after the release of the egg from the ovary.

Features of "pregnant" and "non-pregnant" charts

To understand which basal temperature is characteristic of the body during pregnancy, and which one - with various pathologies, you need to pay attention to the main characteristics of the graphs.

"Pregnant" schedule:

low BBT in the follicular phase of the cycle;
ovulation is clearly identified ( sudden jump BT up);
increased BT in the luteal phase of the cycle;
somewhere on the 21st day, the values of BT decrease noticeably (implantation of the egg occurs) and then the temperature rises again;
there is a third phase of the cycle - gestational - with a BBT value equal to or greater than ovulatory.

Normal "non-pregnant" schedule:

in the first phase, BT values are below 37 degrees;
immediately after the ovulation phase, BBT begins to rise and continues to be at the level of 37 degrees almost until the end of the second phase;
a few days before the onset of menstrual bleeding, the value of BT drops sharply.

The anovulatory schedule is characterized by chaotic bursts of BBT throughout the cycle. Such periods occur in women up to three times a year.

How to measure the temperature to determine pregnancy

The most accurate readings will be with the rectal insertion of a thermometer. In this case, the thermometer can be either electronic or mercury, depending on personal preferences. The following are the basic rules for how to measure basal body temperature to determine pregnancy:

Measurement of basal temperature when planning pregnancy should be done daily in the morning at certain time after sleep, lasting more than six hours. Do not leave bed soon after waking up or sit up abruptly;

In addition, frequent walking during the night rest distorts the research data.

During the day and evening hours there are quite strong fluctuations in BT due to stress, increased activity or banal fatigue. It is not necessary to double-check the morning measurements during the day and in the evening, as this is not informative;
With a mercury thermometer, the temperature is measured within 6-10 minutes, with an electronic thermometer - from 2 to 3 minutes or until the sound signal;
For clarity, it is best to start taking measurements and build a graph from the day of the onset of menstruation. This will allow you to see the temperature difference during the transition from one phase of the cycle to another and evaluate the hormonal background;
For ease of measurement, you can use the usual paper sheet, a printed template, or applications that automatically build graphs based on the entered data.

For your information. The following factors influence the BT indicators:

alcohol;
sex a few hours before the measurement procedure;
stress;
infectious diseases;
too warm sleeping area, for example, from a heating pad;
hypothermia of the lower extremities.

If any of the above factors took place, it is worth making a note about it.

What indicators allow us to conclude that the pregnancy did not take place?

High basal temperatures that persist long time, at possible pregnancy, until confirmation of the fact of delay, unfortunately, are not always a sign of successful conception.

In some cases, such a change may be associated with inflammatory processes in the appendages, and sometimes indicate complications during the gestational period.

Important! It is worth paying attention that there is no need to start panicking when abnormalities are found, since each organism is unique. In case of any doubt, it is better to consult a specialist for an accurate diagnosis.

BT at risk of miscarriage

The threat of miscarriage is associated with underproduction the hormone progesterone that maintains pregnancy. This happens when there are problems with the hormonal background and an incorrectly functioning corpus luteum, which normally appears instead of the follicle.

Know! With this pathology, the values \u200b\u200bdo not exceed 37 degrees.

Thus, if the basal temperature during pregnancy is 36.8 or one tenth of a degree higher, you should pay attention to this and try to understand the reasons for such changes.

BT in missed pregnancy

If the development of the embryo stops, the gland formed at the site of the follicle begins to break down, and the level of progesterone, therefore, falls. This leads to a decrease in BT values \u200b\u200bto 36.4 - 36.9 degrees.

There are cases when, when the embryo freezes, the temperature continues to be held for quite high level. Indeed, it happens when low temperature is not at all indicative of fading. You should always listen to yourself and your inner state.

BT in ectopic pregnancy

Important! In this case, the production of progesterone by the corpus luteum does not stop, as in the normal course of pregnancy. It is impossible to draw conclusions on the basis of BT values in this case.

In the second and third trimesters, it does not play a significant role. It is important to remember that accuracy in measurements is necessary, as any deviations affect the interpretation of the results.

Ask questions about the topic of the article!

How to understand that you are pregnant early?

Certain symptoms, like finding out that you are pregnant at an early stage without a test, indicate the presence of a fetus.

You can determine whether conception has occurred at the very beginning, based on the signs:

the presence of secretions in a small amount;
feeling of nausea;
dietary changes;
blood pressure is lowered;
sensitivity to odors.

Symptoms, how to understand that you are pregnant in the first days without a test, come down to general fatigue, possible discomfort in the uterus. The most obvious symptom is the appearance a small amount secretions. Occur at the beginning of the first trimester. They are scarce, yellowish or pinkish in color. The presence of secretions is due to the fact that the egg is attached to the walls of the uterus.

Nausea occurs during the first weeks. Many do not pay attention to this at first. Some smells begin to irritate, unusual eating habits appear, for example, something salty.

The onset of pregnancy may be accompanied by weakness, dizziness. The reason is the decline blood pressure. The hormonal background is changing. This affects well-being. There are problems with sleep, there will be a headache.

Signs of how to find out that you are pregnant without a test at home include:

temperature increase;
breast augmentation;
discomfort may be felt in the lower abdomen.

You can determine the presence of a fetus by paying attention to the temperature, which often becomes above 37 degrees in the first weeks. She provokes some lethargy of the girl.

Conception often provokes a feeling of discomfort in the lower abdomen. There is a feeling of heaviness, a strange tingling sensation. This is due to the egg, which is attached to the wall of the uterus. After that, it gradually increases. All this helps to determine at home without a test whether a woman is pregnant.

One of the symptoms of how to find out if you are pregnant without a test at home is an upset bowel. The presence of a fetus may be indicated by increased urge to go to the toilet. This sign will accompany all trimesters. Subsequently, the fetus will begin to put pressure on genitourinary system which causes frequent urination.

The main signs of the onset of pregnancy

When the question “how to know that I am pregnant at home without a test?” appears, it is recommended to monitor the work of the intestines. Pregnancy is often accompanied by bloating, strong gas formation, constipation.

Hormonal changes indirectly affect the work of the intestine, which becomes lazy. It is possible to determine that there is a pregnancy, if present, at least a few of indicated signs. If you need to know how to understand that you are not pregnant without a test, you should take the above measures.

There is no pregnancy when:

temperature indicators within the normal range, does not change - there is no increase or decrease, regardless of whether ovulation occurred or not;
when conducting a test with urine, it began to boil, which indicates the absence of a fetus;
there are no universal, key symptoms of fertilization, including nausea, mood swings, changes in the breast area.

Conclusion

Many women have a moment when they ask themselves the question: "How do I know if I'm pregnant without a test before my period?". You can determine pregnancy at home without a test using various folk methods.
Thanks to numerous cases of unmistakable detection of the result, the actions described above make it possible to determine pregnancy even at its onset.
Key signs of how to find out that you are pregnant at home without a test help to identify fertilization.
The detection of at least a few symptoms and the results of the described methods should prompt a woman to take a test.
The final results after determining pregnancy at home without a test should be announced by the doctor after the examination.

Detect early pregnancy it is possible only after the implantation of the fetal egg into the uterine cavity, as a rule, this occurs 7-10 days after ovulation. Until this moment, while the fertilized egg is in fallopian tubes or moves in the uterus in search of a place for implantation, as a rule, there are still no changes in the body of a woman associated with pregnancy.

As soon as fertilized egg penetrates into the wall of the uterus, the pregnancy hormone, the so-called hCG (human chorionic gonadotropin), begins to be produced almost immediately. It is hCG that notifies the woman's body about the fact of the onset early pregnancy.

The fetal egg can be removed by the uterus before implantation, and the woman will not even know about this fact, since there is no delay in menstruation, and the fetal egg comes out along with menstrual flow. Most often, in this way, the woman's body gets rid of defective fetal eggs that cannot attach to the wall of the uterus.

So, the first symptoms of pregnancy may appear as early as 7-10 days after conception, that is, from the first days of implantation of a fertilized egg in the uterus.

Methods for determining pregnancy in the early stages:

At the moment, there are both fairly reliable medical methods definitions of pregnancy, so, and so-called, folk methods based on indirect signs and symptoms of pregnancy.

Most reliable detect early pregnancy it is possible only in the laboratory, by passing tests for the presence of hormones in the blood or by performing an ultrasound scan. Also, a fairly reliable method can be attributed to a rapid urine test to determine pregnancy.

Consider the most accurate medical methods for diagnosing pregnancy:

1. Pregnancy test

The most popular modern way diagnosis. All pharmacy express tests are based on determining the level of the hCG hormone in a woman's urine.

The term for determining pregnancy: can be carried out from 1 day of the expected menstruation delay or 2 weeks after conception. There are more sensitive (with a sensitivity of 10 mIU / ml) tests that allow you to determine pregnancy from the 10th day after ovulation, that is, even before the delay in menstruation. But, for the most reliable results it is recommended to conduct a test on the 7-8th day of a delay in menstruation.

Pros: the accuracy of determining pregnancy is 95%, performed at home, availability, simplicity and convenience of diagnosis, low cost.

Cons: both false positives and false negative results e.g. if the analysis is performed incorrectly, the use of low-quality or expired tests, testing too early, when taking hormonal drugs, tumor processes and other factors. They do not allow to determine the pathology of the course of pregnancy, as well as to diagnose ectopic pregnancy.

2. Determination of pregnancy by an obstetrician-gynecologist.

The doctor necessarily examines the genital organs on the gynecological chair, and also probes the body of the uterus with his fingers for changes in its shape, size and consistency. The doctor also interviews the woman about her well-being and additionally evaluates the presumptive or indirect signs pregnancy.

The term for determining pregnancy: a highly qualified obstetrician-gynecologist can diagnose pregnancy as early as 4 weeks after conception or after 2 weeks of delayed menstruation. As a rule, doctors determine pregnancy starting from the 8th week from conception.

Pros: only a doctor can determine how the pregnancy proceeds, identify possible problems or deviations in pregnancy and correct them in time, and if necessary, prescribe additional methods research.

Cons: not the earliest and reliable method. If a woman does not know about her pregnancy and comes to scheduled inspection up to 5 weeks, there is a possibility that the doctor may not notice the pregnancy. Often, additional tests may be required to confirm pregnancy.

3. Blood test for hCG.

Compliance table hCG levels by the time of pregnancy

Because hCG hormone(human chorionic gonadotropin) is absent in healthy non-pregnant women, it is the most convenient indicator of pregnancy.

The term for determining pregnancy: This analysis can be carried out from 1 day of the alleged menstruation delay or 2 weeks after conception.

Pros: the accuracy of determining pregnancy is 98-99%, shows the duration of pregnancy with an accuracy of up to a week.

Cons: high cost, impossible to carry out at home, you need to contact medical institution, blood is taken from a vein, false negative values are possible if the test is performed too early or during an ectopic pregnancy.

4. Blood test for TBG.

The hormone TBG (trophoblastic beta-globulin) is the earliest marker of pregnancy. It is produced by the embryo to protect against immune system mother.

The term for determining pregnancy: TBG is detected in the blood as early as 10 days after conception, even before the delay in menstruation.

Plus: the accuracy of determining pregnancy is 99%, it is possible to detect a possible pregnancy before the delay of menstruation.

Cons: high cost, cannot be done at home, it is necessary to contact a medical institution, due to the complexity of the determination, not all laboratories carry out blood sampling, blood is taken from a vein, false positive values are possible in oncological diseases and benign tumors female reproductive system.

5. Ultrasound.

The term for determining pregnancy: a study can show the presence of a fetal egg in the uterine cavity from the 5th day of delay or 3 weeks after conception, subject to the high qualification of the doctor conducting the diagnosis and good resolution of the device.

Pros: allows you to determine not only the fact of pregnancy, but also the period with an accuracy of 1-2 weeks, possible pathologies development of the fetus, to identify an ectopic pregnancy, and from 5-6 weeks to establish the fact of multiple pregnancy.

Cons: in the early stages, ultrasound is performed only on medical indications, there is no evidence of the safety of the effect of ultrasonic waves on the embryo, the risk of abortion is high.

Also no less important for determining pregnancy are indirect signs by which a woman, from the very first days of pregnancy, can independently diagnose her “interesting position”.

In addition, it makes sense to measure BBT when planning the sex of a child, to increase the chance of becoming pregnant or to general development– understand the processes taking place in the body and communicate with a specialist in the same language.

It makes no sense to measure the basal temperature once. To be able to draw conclusions and monitor changes in the female body, long-term observation over several months is necessary. For clarity, they draw up a graph with which they are shown to the leading gynecologist. The doctor will be able to note all the points that interest you and explain everything in detail.

To make the correct conclusions, according to the schemes provided by you, can only qualified specialist. There are many nuances that go through the calculations and determine the various deviations.

To obtain reliable data, you should use a number of rules:

Take measurements in the morning without getting out of bed. Time fluctuations should not exceed 30 minutes.
Enter the thermometer rectally for 5-10 minutes.
Preferred use mercury thermometer. It is forbidden to move in this case. .
Repeat the procedure daily for at least 3 cycles.
All changes and concomitant factors (colds, diarrhea, medications) should be recorded on a schedule.

We measure basal temperature to determine pregnancy

If a woman has kept a chart of changes in basal temperature for several months, it will not be difficult for her to determine an early pregnancy from it.

In a normal cycle, the graph displays 2 phases: stability and a sharp increase followed by a decline.

Phase 1 - the first 2 weeks of the cycle. In this period, the basal temperature is relatively balanced (36.3 - 36.8 degrees) and does not have sharp drops;
Phase 2. Basal temperature jumps to 37.1 - 37.3 degrees for 3 - 4 days before ovulation and keeps at maximum levels. Then, about a week before menstruation, it goes down - from 37.0 degrees to a minimum mark of 36.3 - 36.5 degrees.

If the basal temperature did not drop before menstruation, but sticks to the mark of 37.0 degrees or higher, the probability of pregnancy is high. Information is not guaranteed and a test or visit to a doctor is required. Basal temperature monitoring is more suitable for determining safe and auspicious days than to determine early pregnancy. There are many factors affecting temperature changes - disorders, mobility, change climatic conditions, change hormonal background, an increase in body temperature in general.

BT in the early stages

An increase in basal temperature is characteristic of the entire period of pregnancy. Most women stop keeping records when they find out about their situation. In the early stages, the basal temperature corresponds to the indicators of the first days of ovulation - 37.0 - 37.3 degrees. This is due to the production of the hormone progesterone, which is activated simultaneously with ovulation. If conception does not occur, with the release of the egg, its level also decreases, lowering the basal temperature. In the case of pregnancy, the production of the hormone continues, thereby maintaining a high temperature.

How to chart your basal temperature and why

Drawing up a schedule is necessary for a visual display of the activity of the internal genital organs of a woman. On it, you can make calculations and consult with your doctor on pregnancy and diseases. It is much easier to show ordered data than to explain it yourself, especially if you yourself are not sure what is happening.

Using the graph, you can determine the following points:

The time of maturation of the egg, which makes it possible to calculate the days of safe sex and vice versa - a favorable period for conception;
Maturation of the egg and subsequent release from the ovary. Elevated basal temperature in the middle of the menstrual cycle means ovulation;
Find out the features of your endocrine system;
Calculate the date of the onset of menstruation;
Assess the production of hormones by the ovaries;
The absence of an increase in temperature at the expected time of ovulation may indicate pregnancy. For couples seeking to conceive as soon as possible, this information is very useful;
Diseases of the genital organs and inflammatory processes also lead to an increase in basal temperature. It becomes possible to define them on early stages and take timely measures for treatment, without waiting for pain.

You can create a chart in two ways:

Computer Applications

Specialized programs online or downloaded from the network provide the opportunity to keep electronic records. It is comfortable for women who are well versed in computer technology that do not require outside help to complete.

On your own on paper

It is preferable to keep records manually - faster and there is no need to print out in advance to provide to the doctor. In addition, not all women have sufficient computer knowledge.

To draw up a schedule, you need a notebook in a box and a pen. A standard coordinate system is drawn with X and Y axes.

The x-axis marks the interval from the first to the last day of the menstrual cycle. Their number is individual. At different women, due to age, heredity and disease, menstruation can go with a difference of 18 to 40 days. The standard is a cycle of 27 - 29 days for a healthy body.

Temperature indicators are marked along the Y axis. Minimum temperature will be a degree lower than your usual temperature. In most cases - 35.6 degrees. The maximum indicator should be taken with a margin - 37.5 degrees. It is necessary to take into account the fact that there are people with high or low body temperature. This affects both conventional ways measurements - under the arm or through the mouth, and on the rectum. Therefore, you can not use the temperature prescribed in the handbook. If up to this point you have not been interested in your standard body temperature, measure it for several days at a time. calm state in a convenient way for you (mouth or armpit). Having found out the initial parameters, draw up a schedule.

Chart example #1 (click to enlarge)

Chart example #2 (click to enlarge)

Having a blank, you should wait for the start of a new one. monthly cycle and start filling: having measured the temperature in the morning, put the appropriate mark on the graph, and so on every day. By comparing the data of several cycles, a pattern will be found in which the temperature increase will occur in certain period that belongs to you personally. In the following tables, this moment is indicated by a vertical line and is called the ovulation line.

To determine the schedule of days of safe sex and days favorable for conception, you must use the following scheme.

The spermatozoon is viable for 3-4 days, and the egg cell is viable for 1-2 days. Having determined the moment of the onset of ovulation, it is necessary to count back from it the days of the existence of an active spermatozoon. Then add the days of its viability to the moment of release of the egg. The resulting period of time is characterized by the highest probability of becoming pregnant. The rest of the days are presumably safe for having sex without additional contraception. Naturally, no one can guarantee a 100% guarantee.