Amenorrhea:Absence or cessation of menstruation. Amenorrhea is conventionally divided intoprimaryand secondary amenorrhea.
- Primary amenorrhea-- menstruation never takes place. It fails to occur at puberty.
- Secondary amenorrhea-- menstruation starts but then stops.
没有月经怀孕期间是一个form ofphysiologicsecondary amenorrhea, physiologicinthesensethat it is completely normal and is not caused by anything medically harmful (pathologic). Amenorrhea duringlactationis another type of physiologic secondary amenorrhea.
The word "amenorrhea" is compounded from three Greek roots "a-", no + "men", month + "rhoia", flow = no monthly flow. Amenorrhea is less commonly calledamenia.
