The most common tests for ovarian function are blood tests, such as the six endocrine tests on an empty stomach on the second to fifth day of menstruation, which can determine the ovarian function. In addition, AMH can be drawn at any time, which is also a blood test to detect ovarian reserve function, and is relatively accurate. In addition, when a woman is menstruating, especially when she is close to menstruation, a vaginal ultrasound can be done to count the sinus follicles on both sides of the follicles to determine the reserve function of the ovaries. For example, if a woman’s menstrual flow decreases, or if her menstrual cycle is particularly long, or even if she is amenorrheic, there is a possibility that her ovaries are not functioning well.