title: Relationship of duration of estrus to pregnancy rate in normally cycling, nonlactating mares.
mesh_terms: D000818:Animals; D006063:Chorionic Gonadotropin / Q000494:pharmacology; D004971:Estrus / Q000187:drug effects; D005260:Female; D006736:Horses / Q000502:physiology*; D007315:Insemination, Artificial / Q000662:veterinary; D007774:Lactation; D011247:Pregnancy; D011270:Pregnancy, Animal; D013997:Time Factors
chemical_list: D006063:Chorionic Gonadotropin