Perinatal deaths of calves born to heifers mated as yearlings.
D000818:Animals; D000831:Animals, Newborn; D001724:Birth Weight; D001835:Body Weight; D002417:Cattle; D002418:Cattle Diseases / Q000453:epidemiology / Q000401:mortality*; D036861:Delivery, Obstetric / Q000662:veterinary; D003967:Diarrhea / Q000401:mortality / Q000662:veterinary; D004420:Dystocia / Q000453:epidemiology / Q000662:veterinary; D005260:Female; D005313:Fetal Death / Q000453:epidemiology / Q000662:veterinary*; D007746:Labor Presentation / Q000662:veterinary; D008297:Male; D011247:Pregnancy; D012737:Sex Factors; D013997:Time Factors