The feasibility of establishing classification system for ovarian function.

The occurrence, development, and decline of ovarian function are the foundation in women's whole life stages, which reflect the process beginning from embryo formation to the aging. Correct assessment of ovarian function is significant for evaluating the potential reproductive ability and predicting the age of menopause, as well as providing both individualized and proper treatment and preventive care based on physiological characteristics of women in different phases. Ovarian reserve (OR) is used to predict the potential fertility of women by evaluating the follicles and the quantity and quality of eggs.