title: Release of a factor during early stages of contact between hamster sperm and eggs in vitro.
mesh_terms: D000818:Animals; D001681:Biological Assay; D006224:Cricetinae; D005260:Female; D005306:Fertilization; D008297:Male; D010063:Ovum / Q000378:metabolism / Q000502:physiology*; D013075:Sperm Capacitation; D013084:Sperm-Ovum Interactions; D013094:Spermatozoa / Q000378:metabolism / Q000502:physiology*; D013997:Time Factors; D014357:Trypsin / Q000494:pharmacology; D015044:Zona Pellucida / Q000502:physiology*
chemical_list: D014357:Trypsin