title: Penetration of zona-free mouse ova.
mesh_terms: D000818:Animals; D002918:Chymotrypsin / Q000494:pharmacology; D003470:Culture Media; D005260:Female; D005306:Fertilization / Q000187:drug effects*; D006821:Hyaluronoglucosaminidase / Q000494:pharmacology; D007700:Kinetics; D008297:Male; D051379:Mice; D009865:Oocytes; D010063:Ovum / Q000187:drug effects*; D011402:Pronase / Q000494:pharmacology; D013075:Sperm Capacitation; D013084:Sperm-Ovum Interactions / Q000187:drug effects*
chemical_list: D003470:Culture Media; D006821:Hyaluronoglucosaminidase; D002918:Chymotrypsin; D011402:Pronase