Some women even experience their first orgasms during pregnancy. The genitals are engorged, the nerve endings more sensitive, and oxytocin, the hormone that maintains a pregnancy, is known to ignite lust. There's no evidence that sex causes labor. Stimulation of the breasts does speed up the production of oxytocin, which can cause contractions when you're near term. But, as you will no doubt discover, you can experience lots of contractions without going into labor.
Oral sex is out.
Thankfully, that's not the case, and it will become a convenient option when you get too uncomfortable to have actual intercourse. Just don't let your partner blow air forcefully and directly into your vagina. Doing so could cause a life-threatening air bubble in the bloodstream. Copyright 2001, The Parenting Group.