Sometimes a second treatment may be needed.
Clitoral stimulation could cause these effects tangentially, but only if a woman has an orgasm, which is probably unlikely in the throws of labor.
In fact, it may even help.
Thinkstock Orgasm — no matter how or when it is achieved — releases oxytocin, the same hormone that causes labor contractions.
Contractions of the uterus are part and parcel of having an orgasm, and they can be quite powerful and last up to half an hour.
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Women in the group advised to have sex also had it more frequently for the remaining duration of their pregnancies - three times versus two.