title: Letter: The use of vasectomised bulls.
mesh_terms: D000818:Animals; D002417:Cattle; D004971:Estrus; D007315:Insemination, Artificial / Q000662:veterinary; D008297:Male; D011247:Pregnancy; D014245:Trichomonas Infections / Q000517:prevention & control / Q000662:veterinary; D014659:Vasectomy / Q000662:veterinary*; D014735:Vibrio Infections / Q000517:prevention & control / Q000662:veterinary