The ovaries have two major functions in a woman’s life: the endocrine function of producing sex hormones and the reproductive function of ovulation. When you go to the hospital for infertility, your doctor will first help you to assess your ovarian function so that you can have a better understanding and grasp of the golden period of fertility and make a good schedule for fertility. Age is one of the most important factors in assessing a woman’s fertility. After the age of 35, ovarian function begins to decline, and the older a woman is, the lower her ovarian reserve function becomes, and the quantity and quality of her eggs become worse with age. Although women’s fertility gradually declines with age, each person’s situation is different, especially for women with premature ovarian failure, they are younger, but their ovarian function is not as good as women in their 40s, so Age alone cannot be used to accurately estimate ovarian function. Ultrasound during menstruation Many patients do not understand why vaginal ultrasound should be done during menstruation, they feel inconvenient or worry about causing infection, in fact, only ultrasound during menstruation can reflect the basic status of ovaries more accurately. If there are less than 2 small follicles or even none on the ovaries, it is likely that the ovarian function has significantly decreased. When the uterus is found to be shrunken and the ovaries are so small that they can hardly be found under ultrasound, it is very likely that the ovaries are failing. Sex hormone test on the 3rd day of menstruation The 2nd-3rd day of menstruation is the most basic and stable time for sex hormones. The reason for choosing to draw blood during menstruation is the same as ultrasound, both are to reflect the basic state of the ovaries. A higher FSH value on day 3 of the menstrual cycle is indicative of poor ovarian function. If the FSH value on day 3 of the menstrual cycle is greater than 20 IU/L, the chance of pregnancy decreases significantly, and if it exceeds 25 IU/L, there is almost no possibility of pregnancy. At this time, the patient may have combined menopausal symptoms such as hot flashes, palpitations, insomnia, leg cramps, etc., and needs to be treated with medication and is no longer suitable for fertility treatment. If the FSH value on day 3 of the menstrual cycle is between 8 and 10, showing signs of ovarian function decline, you should take the time to actively arrange for fertility treatment as soon as possible. IV. Previous IVF ovulation results If you have already undergone IVF treatment but failed to get good results with less than 3 or 5 eggs retrieved, it may indicate that the ovaries are not responding well to the medication. The doctor will look more at the results of the previous treatment than the above three points to assess the ovarian potential and will formulate a more appropriate and effective plan for the next cycle accordingly. In addition, women who want to have children should pay attention to their menstrual cycle. If the volume of menstruation is lower than usual or the menstrual cycle is gradually shortening, you should be alerted to the signs of ovarian decline and seek early professional treatment at a fertility center.