Menopause is normal for women at the age of 46, and the number of years of menstruation is around 30 years. If a woman has her first menstruation at the age of 13-18, menopause will occur naturally after about 30 years, sometimes related to the woman’s nutrition, health status or ovarian function. It is normal for women to go through menopause after the age of 45, but menopause between the ages of 40 and 45 is called early menopause, and menopause before the age of 40 is called premature ovarian failure. Periodic exfoliation. Only when women have normal menstruation and ovaries ovulate can pregnancy occur normally, and a certain level of hormones is secreted, which helps to maintain the development of secondary sexual characteristics of women.