Breeding unsoundness in the ram: the incidence of contributing conditions. 1. Northland.
D000818:Animals; D001947:Breeding; D005298:Fertility; D007248:Infertility, Male / Q000662:veterinary*; D008297:Male; D009520:New Zealand; D012756:Sheep; D012757:Sheep Diseases / Q000453:epidemiology*