Twinning in cattle.
D000818:Animals; D002417:Cattle / Q000502:physiology*; D003338:Corpus Luteum / Q000502:physiology; D005260:Female; D010063:Ovum / Q000637:transplantation*; D011247:Pregnancy; D014184:Transplantation, Homologous; D014427:Twins; D014599:Uterus / Q000502:physiology