If a woman’s ovarian function declines before the age of 40 and she does not ovulate causing amenorrhea, she is in premature ovarian failure. The number of eggs produced by the ovaries varies from person to person, some more, some less, as long as they can maintain normal menstruation and have mature eggs discharged every month, the ovaries are functioning normally. As women age, generally after the age of 40, the ovarian function will gradually decline and the number of mature follicles will become less and less, which is also a normal physiological phenomenon. Most people experience a decline in ovarian function around the age of 50, causing menstrual disorders and even amenorrhea. Women need to lead a healthy lifestyle, avoid straining and staying up late, and stay in a relaxed mood to avoid long-term mental stress, anxiety and depression, which can affect ovarian function.