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Do you understand the role of basal body temperature curve?

Ⅰ. The role of basal body temperature curve during ovulation

1. Basal body temperature can determine whether ovulation

In clinical practice, basal body temperature is one of the gold standards for determining whether to ovulate. For a female with a normal ovulation cycle, the low temperature phase starts from one day before menstruation to two days and lasts until the day of ovulation. After ovulation, it enters the high temperature phase and lasts 1-2 days after the beginning of the next menstruation. Descend again to enter the next cycle. Single-phase body temperature curve means anovulation.

2. Basal body temperature can observe the corpus luteum function

(1) BBT should rise immediately after ovulation, and continue to be at a high level for ≥11 days. If the BBT rises in a stepped shape (climbing shape), the curve will not reach a high level after 3 days, and if the BBT rises <11 days, it may be due to insufficient corpus luteum function. It is recommended that you seek medical attention in time.

(2) There is a biphasic change in bbt thermometer, but the previous curve continues to rise slowly for many days, and there may be insufficient secretion of progesterone, suggesting the possibility of insufficient secretion of the corpus luteum.

(3) The body temperature fluctuation during the luteal phase is zigzag and biphasic, but the slow drop in body temperature during the next menstruation may be the effect of corpus luteum atrophy. It is recommended to consult a professional doctor.

Ⅱ. The role of basal body temperature curve in early pregnancy

1. Diagnosis of early pregnancy by basal body temperature

In the absence of progesterone or hcg, a rise in basal body temperature of more than 18 days indicates that early pregnancy is possible, and early pregnancy can be confirmed for ≥20 days.

2. Basal body temperature judges the safety of the fetus in the first trimester

In the first trimester, the basal body temperature curve gradually decreases, indicating that the corpus luteum function is insufficient or the placenta function is insufficient, and there is a tendency to miscarriage or early subclinical miscarriage.

3. The role of basal body temperature curve in contraception and pregnancy preparation

(1) Basal body temperature can guide the safe period of contraception

After the basal body temperature continues to rise for 3 days, it is a safe period before the next menstrual cramp. Conversely, two days before and after the lowest basal body temperature is the most fertile period. But everyone should be aware that the safe period of contraception is not 100%.

(2) Basal body temperature guides infertile people to conceive

Sperm can survive in the female reproductive tract for 2 to 3 days, up to 5 days, and the egg loses the ability to fertilize 24 hours after the egg is discharged. An increase in basal body temperature indicates the formation of the corpus luteum, increased production of progesterone, and the egg has long lost the ability to fertilize. Therefore, it is necessary to follow the law of sperm and egg cell life, and to understand the relationship between ovulation and the rise of BBT, in order to increase the chance of pregnancy with the combination of sperm and egg. According to the life span of sperm is longer than egg life, according to the principle of sperm waiting for egg, infertile couples should be instructed to have sex before ovulation instead of 1 to 2 days after ovulation, in order to increase pregnancy rate. Therefore, according to the basal body temperature and combined infertility treatment measures can guide the infertile person to conceive. You can use Shecare basal temperature tracking app to record your own information.

Ⅳ. The role of basal body temperature curve in other aspects

1. Basal body temperature assists in the diagnosis of endometriosis

Basal body temperature does not decrease during menstruation, and those with dysmenorrhea should be suspected of pelvic endometriosis. The normal basal body temperature rises after ovulation and then drops shortly before menstruation. But in endometriosis In patients with symptom, the basal body temperature does not drop during menstruation, and it continues to rise for a few days after menstruation. This is because the lesions of endometriosis will produce heat absorption after bleeding.

2. The basal body temperature can be used to calculate the appropriate endometrial biopsy time

Patients with irregular menstrual cycles who want to know whether the endometrium has secretory response and corpus luteum function should arrange for an endometrial biopsy after the basal body temperature rises 2 to 3 days before the next menstrual cramp.

3. Basal body temperature prompts patients with primary amenorrhea

When the basal body temperature is biphasic, but there is no menstruation, uterine amenorrhea should be considered, such as congenital absence of uterus or genital tuberculosis, which will destroy the endometrium. There are also some people who have too many curettage and severe damage to the endometrium, resulting in no menstruation, but the basal body temperature is still biphasic.

4. Use basal body temperature to choose an appropriate time to have sex with each other to determine the sex of fertility awareness method of birth control.

This item should not be used casually, and it will hinder the gender balance, so I won't introduce it. However, for the fertility of certain genetic diseases, it can be used under the guidance of a doctor.

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