The sex hormone test on the 3rd day of menstruation belongs to a woman’s menstrual period, because the follicles in a woman’s body are still in the state of primordial follicles and have not grown, so the sex hormone level in the body can reflect the basic state of the ovaries and the test is more accurate. The main tests are estrogen, progesterone, androgen, follicle stimulating hormone, luteinizing hormone and lactogen. Luteinizing hormone is a test that detects the luteal body in a woman’s body, which secretes the highest amount on the 22nd day of the menstrual cycle, which is the luteal phase. If a woman is suspected of having problems with her luteal function, it is best to check the progesterone in her body at this time.