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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.
1 Pregnancy is caused by semen (ejaculate or cum) or pre-cum getting inside the vagina. 2  You can avoid pregnancy by not having sex or using both condoms and birth control every time you have sex. 3  Emergency contraception (the morning-after pill) can prevent pregnancy up to five days AFTER unprotected sex.