Normally, a girl’s ovaries begin to develop slowly during puberty, and will mature at around 20 years of age. The secondary sexual characteristics of a girl’s body basically do not develop from birth to puberty, and it is only at the time of the first menstrual period that the body slowly develops and matures, and the female sexual characteristics slowly appear, and the primordial follicles in the ovaries slowly begin to divide, resulting in the appearance of a small number of follicles or secretion of a small amount of hormones. At about 16 years old, women will be in the stage of development, and then with the passage of time, women will be fully developed, so it is best not to have sex before the age of 20, and do not often stimulate their own bodies so as not to affect the development of the ovaries, and at the same time, you can eat more beneficial food for the ovaries, can help to regulate the body.