prostaglandin 

Prostaglandin is a substance in the human sperm, secreted by the prostate gland, used as treatment of congenital heart diseases, prevention and treatment of gastric and intestinal ulcers, menstrual cramps, facilitating the release of the endometrium and mainly through their oxicitoxina, such as treatment to induce and facilitate the delivery of women.

"By their property to induce and facilitate childbirth, increasing vaginal dilation, is that many obstetricians recommend to their patients to increase their sex late in pregnancy, specially in the days before the parturition to increase the absorption of prostaglandin of the sperm from the vagina".

prostaglandin by Willhelmina Plowes October 8, 2015