title: Interaction of stage of the breeding season and intrauterine devices on estrous cycle length in the ewe.
mesh_terms: D000818:Animals; D001947:Breeding; D002369:Castration; D003338:Corpus Luteum / Q000033:anatomy & histology / Q000502:physiology; D004971:Estrus; D005260:Female; D007434:Intrauterine Devices; D010060:Ovulation; D011247:Pregnancy; D012621:Seasons; D012756:Sheep / Q000502:physiology*; D013997:Time Factors