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No Menstrual Period (Amenorrhea)
No Menstrual Period (Amenorrhea) Learning Center

No Menstrual Period (Amenorrhea)
Amenorrhea is the medical term for the absence of menstruation . There are two types of amenorrhea, primary and secondary. Primary amenorrhea refers to delayed menarche (the first menstrual period) and is defined as any one of three conditions: th...