Barrier methods.
D003273:Contraceptive Devices; D003274:Contraceptive Devices, Female; D003275:Contraceptive Devices, Male; D005260:Female; D005298:Fertility / Q000187:drug effects*; D006801:Humans; D008297:Male; D011247:Pregnancy; D014622:Vaginal Creams, Foams, and Jellies / Q000494:pharmacology*
D014622:Vaginal Creams, Foams, and Jellies