Influence of confinement and season of the year on puberty and estrous activity of gilts.
D000818:Animals; D001947:Breeding; D004971:Estrus; D005260:Female; D006799:Housing, Animal; D011247:Pregnancy; D012621:Seasons; D012726:Sexual Behavior, Animal; D012741:Sexual Maturation; D013552:Swine / Q000502:physiology*