Locks and beagles.
D000818:Animals; D002369:Castration; D003307:Copulation; D006224:Cricetinae; D004285:Dogs; D004971:Estrus; D005260:Female; D012739:Gonadal Steroid Hormones / Q000502:physiology*; D006168:Guinea Pigs; D008297:Male; D011247:Pregnancy; D051381:Rats; D012726:Sexual Behavior, Animal; D013552:Swine
D012739:Gonadal Steroid Hormones