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Sperm Killers: 9 Fertility Busters to Avoid
Sperm are energetic little guys, that's for sure. But they aren't particularly hardy. All sorts of seemingly little things can throw them off their game, rendering them unfit for their egg-penetrating duty.
Here are 9 threats every guy should know about, from experts including Dr. Craig Niederberger, professor of urology at the University of Illinois College of Medicine.