Quote Originally Posted by darkfae View Post
Your uterus does contract during orgasm. When you're pregnant, during the last few weeks you're due, I've read and had it confirmed by my doctor that having a really good orgasm will cause the uterus to contract and can stimulate child birth (as well as the oxytocin) and also recommended a a good orgasm after the 6 wks thing stay to help contract the uterus to help it go back to its normal size.
I've also heard that it can help with period pains, though that might just be that after coming enough you don't care :-)