At what age does women experience amenorrhea?

　　women menopause It refers to the period when ovarian function further declines and eventually disappears. According to foreign statistics, women amenorrhea Women who undergo menopause before the age of 40 have a 39% higher risk of death than women who undergo menopause between the ages of 40 and 44, 60% higher than those who undergo menopause between the ages of 45 and 49, and 95% higher than those who undergo menopause between the ages of 50 and 54. Therefore, understanding the various factors that affect menopause and delaying the age of menopause are issues that cannot be ignored in the health care of middle-aged and elderly women.

　　The most important factor in determining a woman's age at menopause is the number of oocytes. baby At birth, each ovary contains approximately one million oocytes, and the number of oocytes continues to decrease after birth. Menopause occurs when the number of oocytes decreases to a critical number. The mechanisms that control or regulate the rate of oocyte reduction are not yet fully understood, but the following factors are clearly related to sooner or later menopause.

　　Women's amenorrhea age, nutrition, and menopausal age are closely related. Studies have found that women with long-term malnutrition, short body, and light weight are compared with women with better nutrition, relatively tall body, and relatively heavy weight. The average age of menopause is 43.6 for the former and 47 for the latter. 3 years old. Smoking is a major factor in early menopause. The phenylpropylpyrene in cigarettes is a lethal factor for oocytes. Animal experiments have shown that a small dose of phenylpropylpyrene can destroy 25% of oocytes, and a large dose of phenylpropylpyrene can destroy 98% of oocytes. Royal Roads University Hospital Surveys show that smoking women enter menopause on average 54 years earlier than non-smoking women.

　　The average age of menopause for urban women in my country is 49.5 years old, and for rural women it is 47.5 years old. The age range for menopause can be between 35-55 years, and is 51.4 years for American women. The age range of menopause can be between 48 and 55 years old. In recent centuries, the age of menarche has tended to be earlier, but the age of menopause has not changed significantly. Menopause before the age of 40 is called "premature menopause" or“ premature ovarian failure ”; About 1% of women undergo menopause before the age of 40, and menopause occurs after the age of 55, which is called "late menopause."