The sex hormone test is usually performed on the 2nd-4th day of menstruation and requires fasting and a half hour of calm before the blood test. When a woman has menstrual disorders during her reproductive years, the results of the sex hormone test can be used to make appropriate adjustments. The second to fourth day of menstruation is during the follicular growth period, and because the hormone levels in the body are low during this period, it can clearly reflect the changes in hormone levels in the body, which is helpful in aiding diagnosis and treatment of diseases. If a woman has menstrual disorders during menopause and has been amenorrheic for more than 3 months, the results of the sex hormone check are usually compared to the follicular luteal phase standard.