Contraceptive methods go back to the basics.
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D051722:ADAM Proteins; D000818:Animals; D002986:Clinical Trials as Topic; D003267:Contraception / Q000379:methods*; D003272:Contraceptive Agents, Male; D003281:Contraceptives, Postcoital; D004527:Egg Proteins / Q000378:metabolism; D005260:Female; D000072196:Fertilins; D005306:Fertilization; D006801:Humans; D008297:Male; D008562:Membrane Glycoproteins / Q000378:metabolism / Q000502:physiology; D008666:Metalloendopeptidases; D011956:Receptors, Cell Surface; D013094:Spermatozoa / Q000378:metabolism; D014944:World Health Organization; D015044:Zona Pellucida / Q000378:metabolism; D000072216:Zona Pellucida Glycoproteins
D003272:Contraceptive Agents, Male; D003281:Contraceptives, Postcoital; D004527:Egg Proteins; D008562:Membrane Glycoproteins; D011956:Receptors, Cell Surface; D000072216:Zona Pellucida Glycoproteins; D051722:ADAM Proteins; D000072196:Fertilins; D008666:Metalloendopeptidases