Comparison of ultrasonic techniques for the detection of pregnancy in ewes.
D000818:Animals; D005260:Female; D008722:Methods; D011247:Pregnancy; D011258:Pregnancy Tests / Q000662:veterinary*; D011270:Pregnancy, Animal; D011272:Pregnancy, Multiple; D012756:Sheep; D014465:Ultrasonics; D014564:Urogenital Abnormalities