Requirement of capacitation for sperm penetration of zona-free rat eggs.
D000818:Animals; D002918:Chymotrypsin / Q000494:pharmacology; D005260:Female; D005306:Fertilization; D066298:In Vitro Techniques; D008297:Male; D010063:Ovum / Q000187:drug effects / Q000502:physiology*; D051381:Rats; D013075:Sperm Capacitation; D013094:Spermatozoa / Q000502:physiology; D013997:Time Factors; D015044:Zona Pellucida / Q000502:physiology*
D002918:Chymotrypsin