【名词&注释】
性传播疾病(sexually transmitted diseases)、负反馈(negative feedback)、克罗米芬(clomiphene)、常见病(common diseases)、子宫癌(metrocarcinoma)、妇女病普查(female disease general survey)、提高治愈率、多发病(frequently occurring illnesses)、适用于(suitable for)、内源性雌激素(endogenous estrogen)
[单选题]活跃期是指
A. 宫口开大3cm到宫口开全
B. 宫口开大1~4cm
C. 胎儿娩出到胎盘娩出
D. 宫口开全到胎儿娩出
E. 从临产到宫口开大3cm