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Perimenopause Transition

Meaning

The Perimenopause Transition is the natural, multi-year phase preceding the final menstrual period, characterized by fluctuating ovarian hormone production that leads to irregular menstrual cycles and a variety of somatic and psychological symptoms. This endocrine shift is marked by unpredictable changes in estradiol and progesterone levels, reflecting the decline in ovarian follicular reserve. It represents a complex neuroendocrine adjustment period for the female body. This phase is distinct from menopause, which is defined as twelve consecutive months without a period.