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Biphasic body temperature

Introduction
Cause
Examine
Diagnosis

Introduction

Introduction Biphasic body temperature is an important indicator of ovulation. The normal body temperature of women during menstruation is slightly lower before ovulation and the lowest in ovulation period. After ovulation, due to the pyrogenic effect of progesterone, body temperature is higher than follicular phase, showing biphasic type. It is a simple and effective method for measuring the ovulation period of self-monitoring means that the basal body temperature rises by 0.3-0.5 degrees Celsius, that is, the fluctuation is at 36.6-37 degrees Celsius. This is due to the progesterone, a hormone secreted by the ovaries after ovulation, which has a heating effect on the whole body. The thermometer indicates the menstrual period, sexual intercourse, cold, fever, insomnia or other diseases and treatments, so that the reference body temperature rises until the 1-2 days before the onset of menstruation.

Cause

Cause

The basal body temperature of normal women of childbearing age is the same as that of the menstrual cycle. This body temperature change is related to ovulation.

The menstrual cycle of women begins with the first day of menstruation. The length of the cycle varies from person to person, ranging from 21 to 35 days, with an average of about 28 days, which is separated by ovulation day and divided into ovulation. The follicular phase, and the luteal phase after ovulation. The length of the follicular phase is not necessarily the same, but the luteal phase is fixed at about 14 days for up to two days. The next day after ovulation, due to the formation of the corpus luteum of the ovary, the secretion of progesterone will increase the body temperature by about 0.6 degrees Celsius, and the body temperature will show a high and low two-phase change. The high temperature period lasts approximately 12-16 days (average 14 days).

1, if there is no pregnancy, the corpus luteum atrophy stops the secretion of progesterone, body temperature drops, back to the basic line, menstrual cramps.

2, if it is already pregnant, because the corpus luteum is supported by embryonic chorionic gonadotropin (hCG), it is converted into the corpus luteum of pregnancy, and the progesterone is continued to be secreted, and the body temperature continues to be high.

3. If the ovary is dysfunctional, there is no ovulation and no corpus luteum formation, and the body temperature will continue to be low.

Examine

an examination

Related inspection

Temperature measurement obstetrics B-ultrasound

The basal body temperature is measured daily, and the curve is drawn to diagnose.

1. Before going to bed every night, put the mercury column of the thermometer to below 35 °C, and put it on the bedside for easy use. After waking up in the morning, do not speak, get out of bed, do not move, do not eat or drink, put the thermometer under the tongue for 5min, night shift workers can measure after sleep 6-8h, record the measured temperature in the basal body temperature table, or remember On a piece of paper, the medical staff draws a thermogram according to the specifications.

2. Menstrual periods, sexual intercourse, colds, fever, insomnia or other diseases and treatments are indicated on the thermometer to indicate the curve.

3. It is necessary to continue to measure body temperature for at least 3 months and strive to be accurate, otherwise it will not reflect ovarian function.

Diagnosis

Differential diagnosis