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The physiological stage that women approaching menopause go through when, due to hormonal changes, they progress from their usual pattern of menstruation through a phase of atypical menstruation, and finally cease menstruating. Perimenopause ends when a woman has not menstruated for a year. quotations examples
Researchers at eight locations across the United States plan to examine the safety and effectiveness of estrogen therapy during perimenopause, the few years just prior to menopause.
2008 March 24, Robert Preidt, “Study to Assess Hormone Therapy Before Menopause”, in ABC News
The scientific study of perimenopause has been going on for decades, and the cultural discussion of this mind and body shift has reached something of a new fever pitch, with several books on the subject coming out this spring and a gaggle of “femtech” companies vowing to disrupt perimenopause.
2021 April 29, Jessica Grose, “Why Is Perimenopause Still Such a Mystery?”, in The New York Times