title: The "Dag" and swollen abaxial midpiece spermatozoan defects in bulls.
mesh_terms: D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000473:pathology*; D007248:Infertility, Male / Q000473:pathology / Q000662:veterinary*; D008297:Male; D013094:Spermatozoa