起病期
The second peak of E_2 occurring in the progesterone stage was broader and coincided with the peak of progesterone. Both the levels of E_2 and P declined two days before the onset of menstruation.
E2第Ⅰ峰一般出现于LH峰的前一天,E2第Ⅱ峰出现于黄体期,较宽,与孕酮峰相印,均于月经来潮前二日下降。
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