PMID: 6398695Dec 1, 1984Paper

A comparison of six methods used for detecting pregnancy in sheep

Australian Veterinary Journal
B R WattI P Campbell

Abstract

The speed and accuracy of 4 ultrasonic devices (Scanopreg, Pregmatic 3, Medata external probe and Medata rectal probe) were compared with udder scoring and harnessed vasectomised rams as methods of pregnancy diagnosis in 177 ewes, 59 of which were non-pregnant. When using the Scanopreg in ewes of greater than 50 days gestation, accuracy in pregnant ewes averaged 98% and in non-pregnant ewes 87%. The Pregmatic 3 was 97% accurate in pregnant ewes after 50 days gestation and was 96% accurate in non-pregnant ewes. Ewes were examined at between 85 and 185 per hour using these devices. The Medata external probe was 99% accurate in pregnant ewes of greater than 110 days gestation but less accurate in early gestation. This instrument averaged 89% accuracy in non-pregnant ewes and an examination rate of 29 to 35 ewes per hour was achieved. The Medata rectal probe averaged 85% accuracy in pregnant ewes after 70 days gestation. Accuracy averaged 94% in non-pregnant ewes. Ewes were examined at between 35 and 59 per hour using this device. After 130 days gestation 84% of ewes had firm, obviously enlarge udders and another 14% had slight to moderate udder development. After 130 days gestation thick, clear udder secretions were expressed from...Continue Reading

References

Aug 6, 1977·The Veterinary Record·D W Deas
Mar 4, 1972·The Veterinary Record·C Richardson
Jul 1, 1983·Journal of Animal Science·M J Trapp, A L Slyter
Mar 1, 1981·Journal of Animal Science·S F Lane, P E Lewis

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Citations

Apr 1, 1993·Theriogenology·A GarcíaR A Pierson
Jul 21, 2011·Reproduction in Domestic Animals = Zuchthygiene·G Erdogan
May 30, 2017·EFSA Journal·UNKNOWN EFSA Panel on Animal Health and Welfare (AHAW)Christoph Winckler

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