妇产科学_生殖内分泌疾病
题目内容

Secondary amenorrhea is defined as

2021-01-14

A.absence of menstruation for 12 months

B.absence of menstruation for 6 normal menstrual cycles

C.absence of menstruation for 3 normal menstrual cycles or 6 months

D.absence of menstruation for 6 normal menstrual cycles or 9 months

E.absence of menstruation for 9 normal menstrual cycles or 2 months

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