Ultrastructure of the "decapitated sperm defect" in Guernsey bulls.
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000473:pathology*; D004822:Epididymis / Q000473:pathology; D007248:Infertility, Male / Q000662:veterinary*; D008297:Male; D008854:Microscopy, Electron; D013094:Spermatozoa / Q000166:cytology*; D013737:Testis / Q000473:pathology