Polyspermic fertilization following tubal surgery in pigs, with particular reference to the rôle of the isthmus.
D000818:Animals; D002452:Cell Count; D004971:Estrus; D005187:Fallopian Tubes / Q000502:physiology* / Q000601:surgery; D005260:Female; D005306:Fertilization; D008297:Male; D010060:Ovulation; D010063:Ovum / Q000254:growth & development; D011247:Pregnancy; D013094:Spermatozoa / Q000166:cytology / Q000502:physiology*; D013552:Swine