title: Molecular mechanisms for prevention of polyspermy.
mesh_terms: D000818:Animals; D001001:Anura; D002462:Cell Membrane; D002467:Cell Nucleus; D006224:Cricetinae; D005260:Female; D005306:Fertilization; D008297:Male; D008967:Molecular Biology; D051381:Rats; D012617:Sea Urchins; D013045:Species Specificity; D013094:Spermatozoa / Q000648:ultrastructure