8 Types of Spermicide: Condoms, Gels, Foams, and More Can you have sex in the shower with a condom without getting pregnant? Can Lube Kill Sperm and Prevent Pregnancy? What Science Says Ultra Thin Condoms with Spermicide Trojan Could Your Lube be Hurting You? FeminaPT It's National Condom Month. Condoms are pretty cheap, at most pharmacies, and when used correctly, highly effective at preventing pregnancy and sexually transmitted infections. If you always use one