Menopause

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Menopause is the time when menstrual periods permanently stop, marking the end of the reproductive phase for female humans. The menopausal transition can be divided into three stages: perimenopause, menopause and postmenopause. Menopause is a natural part of aging, it can also be a result of surgery, or have another medical or non-medical source. Natural menopause is the result of a decrease in the production of the hormones estrogen and progesterone. Natural menopause typically occurs between the ages of 45 and 55, although the exact timing can vary occurring earlier or later for a variety of reasons, for example tobacco use may result in an earlier menopause while having been pregnant may result in a later menopause. Surgical menopause occurs as the result of a surgery that removes both ovaries. Surgical removal of the ovaries or ovarian failure before the age of 40 years is termed "premature ovarian insufficiency". A marked decrease in hormone levels can have other sources, including...

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