J. Anim Sci.
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J. Anim Sci. 1972. 34:772-775.
© 1972 American Society of Animal Science
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Early Pregnancy Detection in Ewes by Intrarectal Reflection Echo Ultrasound1

Ivan L. Lindahl2

U.S. Department of Agriculture, Beltsville, Maryland 20705

Abstract

A technique for early detection of pregnancy in ewes with intra-rectal amplitude-depth ultrasound is described. Used as a complementary method with the intrarectal Doppler, pregnancy can be detected during the early part of the second trimester with an accuracy approaching 100%. Repeated positive amplitude-depth responses coupled with negative Doppler responses indicate early fetal death or reproductive tract abnormalities.

Footnotes

1 The author expresses his appreciation to G. M. Sidwell, Animal Science Research Division, A.R.S., Beltsville, Maryland, for the lambing data and to C. E. Terrill, Animal Science Research Division, A.R.S., Beltsville, Maryland, for technical support.

2 U. S. Department of Agriculture, A.R.S., Animal Science Research Division, Sheep and Fur Animal Research Branch, Beltsville, Maryland 20705.






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Copyright © 1972 by the American Society of Animal Science.