various graphs of basal temperature


  • What is measured BT
  • How to measure the basal temperature
  • What determines BT
  • Determination of ovulation
  • The length of the second phase
  • How to determine pregnancy by BT

Measurement of basal temperature is today a popular folk way when planning a pregnancy, so it is important to learn how to schedule the basal body temperature (BT).
Back to contents

What is measured BT

The basal (rectal) - the body temperature after sleeping at least 3-6 hours, a person must be at rest. Measurement of basal temperature is in the mouth, rectum, vagina. Body temperature at this time is essentially independent of external factors. Most women accept the request of the doctor to measure the basal temperature as a formality, but it is not so.

Measuring basal body temperature - one of the tests of diagnosis of ovarian function. As a result of its measurements plotted, which is subsequently analyzed. To measure the basal temperature and make the schedule recommended in the following cases:

  • If unsuccessful attempts to become pregnant within one year.
  • If you suspect your partner or at infertility.
  • If you suspect you have a gynecologist hormonal disorders
  • If you want to increase the chances of getting pregnant.
  • In experiments with methods of planning sex.

In the measurement of basal body temperature, you can learn:

  • Time oocyte maturation (to determine the day of ovulation in order to protect or, on the contrary, the best opportunity to get pregnant);
  • To make the definition of the quality of the endocrine system;
  • To prevent the possible gynecological problems such as endometriosis;
  • Define the boundaries of the menstrual cycle;
  • To determine pregnancy at a delay of menstruation;
  • To assess whether the ovaries produce hormones in different phases of the cycle.

The correct measurement of basal body temperature chart can show the ovulation in addition to having her absence, point to disruptions of the endocrine and reproductive system. To make the measurement of basal temperature should be for a minimum of 3 cycles for the accuracy of the information that will predict the date of ovulation and to determine the most favorable time of conception.

To measure the basal temperature will need an ordinary medical thermometer (mercury or electronic). Thermometer prepare the evening in advance, put it next to the bed.

 correct measurement of basal body temperature
Back to contents

How to measure the basal temperature

  1. To measure the basal temperature should be every day, including during menses.
  2. The measurement can be carried in the mouth, vagina, rectum. It is important for the cycle does not change the place of measurement. When measuring the temperature of the armpit results may be inaccurate. In the case of oral measurement of basal body temperature thermometer placed under the tongue, and the temperature measured with the mouth closed for 5 minutes.
    In the case of vaginal or rectal way to enter the narrow part of the thermometer into the vagina or anus is measured 3 minutes.
  3. Measure the basal temperature in the morning, after waking up, before getting up from bed.
  4. Measurement should be made at one time, with a difference of no more than 1, 5 hours.
  5. The duration of uninterrupted sleep prior to measurement should be not less than three hours.
  6. Do not change the thermometer in the measurement period.
  7. Basal temperature measured fixedly in a supine position. It is not necessary in this case to make any unnecessary movements, turn, is necessary to maintain a minimum activity does not wake up. Therefore, the thermometer is better to cook in the evening and put near the bed to be able to reach it with his hand.
  8. Indications with the thermometer is removed immediately after extraction.
  9. Basal body temperature is recorded immediately after the measurement. BT every day about the same, characterized by tenths of a degree. If the reading thermometer Border, fix the lower figure.
  10. The schedule should indicate the reasons for which could happen basal temperature increase, for example, inflammatory diseases.
  11. Business trips, flights, on the eve of sexual activity can significantly affect the measurements.
  12. In diseases accompanied by fever, basal body temperature will be uninformative. At the time of measuring the disease was stopped.
  13. On the basal temperature can affect medications (hypnotics, hormones, sedatives). Measuring basal body temperature while taking oral contraceptives is meaningless, the same in the case of receiving a large amount of alcohol.
  14. At night shifts basal temperature is measured in the afternoon after 3-4 hours of sleep.

 measurement of basal body temperature to determine ovulation

Back to contents

What determines BT

BT body during the cycle is changing under the influence of hormones. During oocyte maturation increases the level of estrogen (the initial phase of the cycle, gipotermichnaya), BT low in anticipation of ovulation the temperature drops to a minimum, and then rises again, becoming a maximum. At this time, ovulation occurs. The temperature after ovulation becomes high, due to a decrease in estrogen levels and increased levels of progesterone. Pregnancy due to the influence of progesterone, too, takes place at an elevated temperature. Difference between low- and high-temperature phases of 0, 4-0, 8 °. Only when a particularly accurate measurement of BT possible to fix all the phases of the cycle.

During menstruation usually values ​​around 37 ° C, during maturation of the follicle is not more than 37 ° C, just before ovulation values ​​are reduced, and after ovulation basal temperature slightly increased - up to 37 1 ° C. Until next month, and BT increased slightly reduced to the onset of menses.

If the first phase of BT rate is higher than in the second, it may indicate insufficient amount of estrogen will require medication to correct it. If the second phase of BT below the first, it is possible to draw conclusions about the low level of progesterone, which also requires correction of hormonal levels.

Stable two-phase cycle of talks about ovulation has occurred. This is the norm for healthy ovaries. A schedule BT, you can not only find out when the ovulation occurs, but also to identify the processes occurring in your body.

If the graph is constructed properly, then it can not only produce a definition of ovulation the basal temperature, but also to identify certain diseases.
Back to contents

Determination of ovulation

Speaking about occurrence of ovulation, the rules should be listed by WHO:

  • 3 consecutive temperature values ​​should be above the line which held the top six previous temperature values.
  • The difference between the three temperature values ​​and the middle line should be not less than 0, 1 degree two days three and not less than 0, 2 degrees in one of the days.

It happens, it is not always possible to determine ovulation by this method due to the presence of high temperatures in the initial phase of the cycle. Then, by analyzing the graph of basal temperature, use the "rule of thumb" is excluded values ​​differing from the preceding or subsequent greater than 0, 2 degrees. These values ​​should not be included, if the schedule of BT as a whole is correct.

The most optimal time for conception - it is the day of ovulation itself and two days prior to its occurrence.

In general, the length of the cycle 21-35 days is considered normal. If your cycle is different from these values, it is possible ovarian dysfunction that is often the cause of infertility.

 determining ovulation
Back to contents

The length of the second phase

The graph of basal body temperature can be divided into two phases. The division says putting in place lines of ovulation (it is vertical).

The duration of the second phase of 12-16 days in normal, usually 14 days. The duration of the first phase is highly variable, depending on the individual woman. At the same time, the total duration of the cycle is changed only for the duration of the first phase.

Examples of common problems identified on the charts and confirms the subsequent studies, - failure of the second phase. When, during surveillance for several menstrual cycles for those which basal temperature, you noted that the second phase is less than 10 days, you should consult a gynecologist.

The normal curve represents the temperature difference between phase 1 and 2 are not greater than 0, 4 degrees. If not, there may be hormonal problems. It is necessary to make an analysis of estrogen and progesterone.

Sample schedule when estrogen-progesterone deficiency

There is a small rise in performance in phase 2. The difference in phases 1 and 2 are not greater than 0, 2-0, 3 °.

BT starts to rise only shortly before menstruation, with no reduction in premenstrual. 2 phase can last at least 10 days.

This schedule is not the norm, it may indicate a miscarriage.

On this chart is not typical basal body temperature at ovulation, it could be in this case an anovulatory cycle.

Any woman may occur from time to time anovulatory cycle, but it does not have to be repeated several times in a row. Without ovulation, it is impossible to conceive.

Sample schedule when estrogen deficiency

This disorderly temperature line, swings, there are significant indicators in this case necessarily require blood tests for hormones and a study of US. If necessary, prescribed drugs.

Sample schedule when estrogen deficiency

In the 1st phase in a woman's hormone estrogen prevails. Under his influence BT to ovulation lasts willows under 36, 2-36, 5 °. If the indicators are rising in phase 1 and stay above these values ​​imply lack of estrogen. Then the average 1 phase increased to 36, 5-36, 8 ° C and kept at this level. To remedy the situation prescribed hormonal drugs.

Example schedule with inflammation of the appendages

Another reason for the increase of the temperature values ​​in one phase may become inflamed appendages. Then the figure rises to 37 ° only for a couple of days in phase 1, and then fell again. With such a schedule difficult to calculate ovulation. Basal temperature during ovulation can be masked because of the increase in the inflammatory process. This is an example of why it is important to determine the performance of BT throughout the cycle.

Sample schedule when endometritis

The normal temperature readings in phase 1 decrease in menstrual bleeding. If the figures in the end of the cycle before the onset of menses fall and rise again to 37 ° at the start of menses, it indicates likely on the endometrium. Characteristic values ​​of temperature decrease before menstruation and increase with the beginning of a new cycle.

Example of schedule in case of insufficiency of the corpus luteum

In the 2nd phase, the body produces progesterone. He is responsible for the temperature rise in the 2nd phase and prevents the onset of menses. With its lack of temperature readings rise slowly, and pregnancy in this case may be in jeopardy.

The body temperature rises to menstruation, premenstrual no recession. But nevertheless the diagnosis is made by analyzing progesterone taken in phase 2.

Sample schedule when estrogen-progesterone deficiency

In the case of a combination of low temperature in the 2nd phase and mild increase of indices (0, 2-0, 3 ° C) after ovulation you can see an example of failure of two hormones.

Example chart in hyperprolactinemia

Due to the increase of the hormone prolactin, which is responsible for the maintenance of pregnancy and lactation, the schedule of BT can be similar to the graph of a pregnant woman. Menstruation can also be absent.

Signs of a possible infertility, which can be determined according to schedule BT:

  • The average value of two phase values ​​higher than one phase at least 0, 4 °. During phase 2 cycles have values ​​falling temperature (below 37 °).
  • Increasing the value in the middle of the menstrual cycle is longer 3-4 days.
  • 2 phase is less than 8 days.

Back to contents

How to determine pregnancy by BT

The definition of pregnancy by this method is possible only in the presence of ovulation. Once again, it should be recalled fluctuations in body temperature at ovulation: prior to the onset of BT low (up to 37 °), before ovulation BT drops, immediately after its occurrence rises to 0, 4-0, 5 °.

If BT after the jump (basal temperature at ovulation) remains elevated longer than 14 days, it indicates the occurrence of pregnancy.

In the case of pregnancy, menstruation does not occur, the temperature readings during pregnancy remain elevated.

Reduced BT during pregnancy may indicate a lack of hormones that are responsible for the continuation of the pregnancy, it may cause a threat to its interruption.

Setting any of the diagnosis only on the basis of graphs BT is not possible, the final diagnosis is based on surveys conducted by gynecologist.

 Basal Temperature