Natural menopause is when menses permanently cease because the ovaries stop producing estrogen and progesterone. It generally occurs in women after 45 years of age with no pathological or physiological cause, but early menopause can result from surgery, chemotherapy, radiotherapy, or primary ovarian insufficiency. Perimenopause is the transitional phase into menopause and may last between 4 to 8 years.[1]
What is menopause?
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•Last Updated: May 16, 2025
Menopause is the natural cessation of menstruation as the ovaries stop producing estrogen and progesterone and typically occurs after age 45. The transitional phase leading to menopause, known as perimenopause, can last 4 to 8 years and may be affected by factors such as surgery or chemotherapy.