阴道口;屄;阴门;
To reach a stage in labor when a large segment of the fetal scalp is visible AT the vaginal orifice. Used of a fetus or the head of a fetus.
露顶分娩中包括胎儿头盖的大部分出现在阴道口的阶段。用于指胎儿或胎儿的头部
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