<unk>  is a natural cessation of the menstrual cycle because of  deficiency production of estrogen and progesterone hormones in women."It occurs at an average age of 52 years, but the age of natural<unk>  can vary widely from 40 to 58 years". it is considered a natural end to fertility in women, and menstruation becomes less frequent, eventually stopping altogether.
Menopause
Menstruation
Sexual maturity
Premenstrual syndrome
Secondary amenorrhea
Pregnancy
Menstrual cycle
Anovulation