Border disease of sheep: vaccination of ewes before mating.
D000818:Animals; D005260:Female; D005315:Fetal Diseases / Q000662:veterinary*; D011247:Pregnancy; D011251:Pregnancy Complications, Infectious / Q000517:prevention & control / Q000662:veterinary; D012756:Sheep; D012757:Sheep Diseases / Q000517:prevention & control*; D014611:Vaccination / Q000662:veterinary*