title: Polyspermic fertilization in pigs during the luteal phase of the estrous cycle.
mesh_terms: D000818:Animals; D006063:Chorionic Gonadotropin / Q000494:pharmacology; D004971:Estrus / Q000502:physiology*; D005260:Female; D005306:Fertilization / Q000187:drug effects*; D006064:Gonadotropins, Equine / Q000494:pharmacology; D007273:Injections, Intramuscular; D007279:Injections, Subcutaneous; D007315:Insemination, Artificial; D008297:Male; D008858:Microscopy, Phase-Contrast; D010060:Ovulation / Q000187:drug effects; D011247:Pregnancy; D013094:Spermatozoa; D013552:Swine / Q000502:physiology*
chemical_list: D006063:Chorionic Gonadotropin; D006064:Gonadotropins, Equine