The common term “premature ovarian failure” means that the ovaries are depleted of follicles for various reasons, resulting in no ovulation, no ovulation, no menstruation, delayed menstruation and reduced volume, i.e. premature ovarian failure. You can monitor ovulation by doing ultrasound and checking the hormone levels in the blood. We usually talk about premature ovarian failure before the age of 40. If the ovaries are not menstruating after the age of 40, we consider it normal, but before the age of 40, the follicles in the ovaries are depleted for various reasons, or are medically damaged, i.e. there are no follicles, and if there are no follicles, there is no ovulation, and if there is no ovulation, there is no menstruation, or even delayed menstruation or very low menstruation, and if there is no menstruation, there is no ovulation, and if there is no ovulation, there is no pregnancy, which is called infertility, and causes the estrogen level to drop. This causes a decrease in estrogen levels. The decrease in estrogen level will reflexively cause the pituitary gland to increase the level of gonadotropins, which will lead to the diagnosis of premature ovarian failure.