Hormone 6 is a commonly used test in gynecology and endocrinology. Hormone 6 should be measured on an empty stomach to ensure the accuracy of the test. The main reason for the hormone 6 test is to clarify the secretion of hormones in the patient’s body and further determine whether the patient has endocrine disorders according to the time of the test. Conducting the test on an empty stomach will not cause errors in the test results due to the influence of food, and can more accurately reflect the basic functional status of the ovaries. The best time for the 6 hormone tests is 3-5 days after the onset of menstruation, at 9-10 am on an empty stomach, because the hormone levels are closest to the basal state in these days, and the test results will be more accurate. If the patient’s menstruation is not regular and does not come for a long time, the patient can be examined by ultrasound first, and if the thickness of the endometrium is about 0.2cm, the blood can be drawn directly for the examination; if the thickness is more than 0.2cm, the patient can use drugs to promote menstruation under the guidance of the doctor, and then be examined again when the menstruation comes. Precautions 1, patients who want to know the ovulation function, it is recommended to draw blood on the second or third day of menstruation; 2, before drawing blood, in addition to fasting, but also pay attention to do not overwork and strenuous exercise, to the hospital at least half an hour of rest before drawing blood; 3, before drawing blood, do not stimulate the nipple, so as not to lead to the prolactin test abnormalities.