Modification of behavioural oestrus in the ewe by social and hormonal factors.
D000818:Animals; D002369:Castration; D004958:Estradiol / Q000494:pharmacology; D004971:Estrus / Q000187:drug effects / Q000502:physiology*; D005260:Female; D008297:Male; D011247:Pregnancy; D012725:Sexual Behavior; D012756:Sheep
D004958:Estradiol