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December 16, 2011 - 04:32. Having sex more often can reduce the risk of developing a serious medical condition called pre-eclampsia during pregnancy. Sperm contains a special protein that increases the chances for a successful pregnancy.
Sex Heats Up Around Women's Ovulation Date. Unprotected Sex Around Ovulation Increases Chance of Pregnancy. From the WebMD Archives. June 9, 2004 -- Your parents or sex education teacher may have told you that it only takes a single act of unprotected sex to make a baby, but new research suggests it may be much more likely than they thought.