Preliminary observations on reproductive failure in sows.
D000818:Animals; D005260:Female; D005313:Fetal Death / Q000662:veterinary; D007247:Infertility, Female / Q000662:veterinary*; D011247:Pregnancy; D013552:Swine; D013553:Swine Diseases; D014777:Virus Diseases / Q000662:veterinary*