But if it does happen, the resulting uterine contractions and increased lubrication can help draw up and hold sperm in the uterus.

但是如发生了，由此产生宫收缩和润滑增加有助于在宫中吸收和保持精。

Irregular, painless uterine contractions that may occur in the third trimester.

在妊娠晚期可能出现无规律、无痛性宫收缩。

Some people are experiencing pain before the uterine contraction starts.

有些人甚至在宫收缩开始之前就感到疼痛。

Power refers to forceful uterine contractions, passenger refers to the fetus, and passage refers to the route that the fetus has to travel through the bony pelvis.

产力指有力宫收缩，娩出物指胎儿，产道指胎儿盆路径。

The first works hormonally, by blocking progesterone receptors, and the second mimics a molecule which induces labor, stimulating uterine contractions and causing the cervix to soften and dilate.

第一种药物通阻断孕酮受体发挥作用，而第二种则模拟一种引发分娩分，刺激宫收缩， 使宫颈软化并扩张。

Yes, so labor is the physiologic process of delivery of a baby from the uterus, through the cervix, through the vagina, and it requires regular uterine contractions, dilation of the cervix, and thinning of the cervix, or effacement.

是，分娩是指通宫、宫颈和阴道将婴儿娩出生理程，这一程需要有规律宫收缩、宫颈扩张以及宫颈变薄，即宫颈消失。