When is the best time to check the six female hormones?

The six hormone tests are very important for female friends. If you do not do these tests, the physical examination will not be comprehensive enough. You should do this test before the menstruation to make a better diagnosis of the disease and avoid any misdiagnosis. Also, you should pay more attention to rest after the examination to avoid being in a state of overwork and affecting your health.

The best time to check endocrine system is 3-5 days after menstruation. This period belongs to the early follicular stage and can reflect the functional status of the ovaries. However, for those who have not had their menstruation for a long time and are eager to know the test results, they can have the test at any time. The time will be taken as the time before menstruation, and the results will refer to the test results of the luteal phase.

The most accurate result is obtained by having a fasting blood test at 9 a.m. on the 3rd to 5th day after the onset of menstruation. For those who are infertile or have amenorrhea, or have not had menstruation for a long time, the examination can be done at any time, but it is best to do it on an empty stomach.

As long as men do not do strenuous exercise and lead a regular life, they can check at any time on an empty stomach between 8 and 11 a.m.

1. Testosterone (T): 50% of testosterone in women is converted from peripheral androstenedione, about 25% is secreted by the adrenal cortex, and only 25% comes from the ovaries. The main function is to promote the development of the clitoris, labia and mons pubis. It has an antagonistic effect on estrogen and has a certain impact on systemic metabolism. The normal concentration of T in female blood is 0.7～3.1nmol/L. High blood T levels are called hypertestosterone, which can cause infertility. When suffering from polycystic ovary syndrome, the blood T value also increases. Based on clinical manifestations, other hormones can be measured if necessary.

2. Estradiol (E2): Secreted by the ovarian follicles, its main function is to promote the transition of the endometrium into the proliferative phase and promote the development of female secondary sexual characteristics. The concentration of blood E2 is 48-521 pmol/L in the preovulatory period, 70-1835 pmol/L in the ovulatory period, and 272-793 pmol/L in the postovulatory period. Low values ​​are seen in ovarian dysfunction, premature ovarian failure, and Sheehan's syndrome.

3. Progesterone (P): Secreted by the corpus luteum of the ovary, its main function is to promote the transition of the endometrium from the proliferative phase to the secretory phase. The blood P concentration is 0-4.8 nmol/L before ovulation and 7.6-97.6 nmol/L in the late ovulation period. Low blood P values ​​in the late ovulation period are seen in luteal insufficiency, ovulatory dysfunctional uterine bleeding, etc.

4. Luteinizing hormone (LH): A glycoprotein hormone secreted by the alkaliphilic cells of the anterior pituitary gland. It mainly promotes ovulation. Under the synergistic action of FSH, it forms a corpus luteum and secretes progesterone. The concentration of blood LH is 2-15mIU/ml in the preovulatory period, 30-100mIU/ml in the ovulatory period, and 4-10mIU/ml in the postovulatory period. The normal value during the non-ovulation period is generally 5 to 25 mIU/ml. A level lower than 5mIU/ml indicates gonadotropin insufficiency, which is seen in Sheehan's syndrome. If high FSH is accompanied by high LH, ovarian failure is very certain and no other tests are necessary. LH/FSH≥3 is one of the bases for diagnosing polycystic ovary syndrome.