• The transition time in a woman's life that begins when ovaries produce less estrogen and menstruation becomes less frequent, and ends when the ovaries no longer produce eggs and menstruation stops.
  Harvard Dictionary of Health Terms
  Harvard Medical Publishing, 2011
• The transitional period before and after MENOPAUSE. Perimenopausal symptoms are associated with irregular MENSTRUAL CYCLE and widely fluctuated hormone levels. They may appear 6 years before menopause and subside 2 to 5 years after menopause.
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2025
• Perimenopause means "around menopause" and refers to the time during which your body makes the natural transition to menopause, marking the end of the reproductive years. Perimenopause is also called the menopausal transition.
  Mayo Clinic
  Mayo Foundation for Medical Education and Research, 2025