The purpose of the examination on the third day of menstruation is to see how the ovarian reserve function is during the follicular phase, and some of them are examined after ovulation, in order to understand how the luteal function is after ovulation. The purpose of the examination is different, and the time is different. However, in theory, as long as you don't use drugs that affect endocrine in the first two months, you can check it at any time, because the results will have reference ranges for different periods such as follicular phase, ovulation phase and luteal phase. Six sex hormones include: follicle-stimulating hormone (FSH), luteinizing hormone (LH), estradiol

(E2), progesterone (P), testosterone (T) and prolactin (PRL), with the following precautions: 1. Most hospitals require that on the third day of menstruation, this period belongs to the early follicular stage, which can reflect the functional state of the ovary; 2. Hormone drugs can't be used for 2 months before the examination, and traditional Chinese medicines or Chinese patent medicines that affect endocrine can't be used for 1 month; 3. Try not to eat greasy food, especially high-protein food < P > the night before the examination, and it is best to have an empty stomach on the day of the examination, and it is more accurate to check at 1 am; 4, it is best to add three thyroid hormones. Clinically, abnormal thyroid hormones can also affect pregnancy; 5, the inspection cost is generally around 2-3; 6, the result time, fast for the day, slow, 7 days; 8, because the standards of each hospital will be different, the most appropriate way is to consult the hospital where you see a doctor-if my reply is helpful to you, please set it as the best answer and help friends who also need help ~