Useful methods of contraception.
D000022:Abortion, Spontaneous; D003267:Contraception / Q000379:methods*; D003270:Contraceptive Agents; D003273:Contraceptive Devices; D005193:Family Planning Services; D005260:Female; D006801:Humans; D008297:Male; D011247:Pregnancy
D003270:Contraceptive Agents