Modern women are having their first child later and later, and with the opening of the two-child policy, there are more and more pregnant mothers of advanced age. However, it is an indisputable fact that the fertility of older women is declining. Ovarian function decreases after the age of 30, and this trend decreases significantly at the age of 35, which means that it is not easy to get pregnant and the risk of pregnancy increases. In our clinic, we often encounter many women who are concerned about the possibility of having difficulty conceiving in the future. There are several blood tests that can be used to assess an individual’s ovarian function: 1. AMH Anti-Mullerian Hormone The most recent assessment of ovarian function is AMH (Anti-Mullerian Hormone), which is present in the granulosa cells of all primordial and initial follicles. The higher the AMH level, the more abundant the ovary will be in the future, and the lower the level, the more limited the egg supply. Some experts suggest: AMH > 2 (ng/ml) → normal value AMH < 2 (ng/ml) → indicates diminished ovarian function, early planning for pregnancy and childbirth is recommended 2. FSH < 8 (IU/L) → shows normal egg stock FSH > 10 (IU/L) → declining egg stock 3. E2 Estradiol, also known as Estradiol, is a female hormone secreted by ovarian granulosa cells. The role of E2 is to stimulate endometrial hyperplasia, which can be used to assess ovarian function, and E2 concentration decreases during menopause. There is an absolute relationship between egg quality and age. In summary, if a woman over 30 is considering having a baby, she can first go to the hospital for a gynecological ultrasound to assess the condition of the uterus, ovaries and follicles, and have blood drawn to measure AMH, FSH and E2 to assess current and future ovarian function, and consult a reproductive endocrinologist as appropriate. The other half should also undergo a routine semen analysis at the right time to rule out the cause of male infertility, so that the right medicine can be administered later to promote “fertility”.