• Ovulation, the release of an egg from an ovary, is part of the menstrual cycle.
  • Menstruation is the process in which the endometrium of the uterus is shed from the body.
  • The menstrual cycle is controlled by hormones from the hypothalamus, pituitary gland, and ovaries.
  • For most women, menstrual cycles continue until their mid- or late- forties.
  • Then women go through menopause, a period during which their menstrual cycles slow down and eventually stop.
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