Amenorrhea News and Research

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Amenorrhea is the absence of a menstrual period. Primary amenorrhea is when a young woman has not yet had a period by age 16. Secondary amenorrhea describes someone who used to have a regular period but then it stopped for at least three months (this can include pregnancy).
Study clarifies role of ERβ in growth and regeneration of skeletal muscle in female mice

Study clarifies role of ERβ in growth and regeneration of skeletal muscle in female mice