The normal female ovaries are a pair of partial ovals that produce eggs, expel them, and secrete hormones, and their size varies with age. The surface of the ovaries is smooth before puberty; after puberty, the surface becomes uneven as ovulation begins. After menopause, the ovaries gradually shrink and become smaller and harder, and are not easily palpable during gynecological examinations. There are individual differences in the size of the ovaries under normal physiological conditions, which are also related to age and the menstrual cycle. For example, during ovulation, the ovaries increase in size due to hormonal factors and the gradual maturation of the follicles, and become smaller after ovulation. There is a primary ovarian dysplasia, a congenital small ovary, often accompanied by primary amenorrhea, female secondary sexual characteristics dysplasia, female endocrine examination, often accompanied by low sex hormones; another pathological condition is: ovarian enlargement, it may be caused by inflammatory infection of the ovaries, ovarian cysts, polycystic ovaries, ovarian tumors, etc.. The other pathological condition is: ovarian enlargement, which may be caused by inflammatory infection of the ovaries, ovarian cysts, polycystic ovaries, ovarian tumors, etc. The cause of ovarian shrinkage may also be a decline in ovarian function, or premature ovarian failure due to a decrease in ovarian follicles from certain unknown causes.