The failure of pregnant mare serum gonadotrophin to prevent summer infertility in pigs.
D000818:Animals; D005260:Female; D006064:Gonadotropins, Equine / Q000627:therapeutic use*; D007247:Infertility, Female / Q000517:prevention & control / Q000662:veterinary*; D011247:Pregnancy; D012621:Seasons; D013552:Swine; D013553:Swine Diseases / Q000517:prevention & control*
D006064:Gonadotropins, Equine