The fertility of bulls born co-twin to heifers.
D000818:Animals; D001789:Blood Group Antigens; D002417:Cattle; D002418:Cattle Diseases / Q000209:etiology*; D004200:Diseases in Twins / Q000662:veterinary*; D005298:Fertility; D005611:Freemartinism; D005632:Fructose / Q000032:analysis; D007248:Infertility, Male / Q000209:etiology / Q000662:veterinary*; D007621:Karyotyping; D007962:Leukocytes / Q000166:cytology; D008297:Male; D009030:Mosaicism; D012661:Semen / Q000032:analysis; D013094:Spermatozoa
D001789:Blood Group Antigens; D005632:Fructose