Reproduction and Physiology

Clinical Use of Reproductive Tract Scoring to Predict Pregnancy Outcome

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Abstract

Heifers in the MACEP heifer development program were reproductive tract scored from 1993 through 1997. These heifers were born between February 1 and May 15 each year. They were brought to the MACEP heifer development program in the fall or winter and fed to attain 65% of their mature body weight at breeding time. The heifers were reproductive tract scored 30 to 60 days prior to breeding; estrus cycles were synchronized, and heifers were bred by artificial insemination (AI) 12 hours after they were observed in standing heat. Ultrasound evaluation was utilized at approximately 30 days post AI breeding to determine the AI pregnancy rate. There was a positive correlation between high reproductive tract scores and percentage conception by AI.

Keywords: ASL R1656

How to Cite:

Pence, M., BreDahl, R. & Thomson, J. U., (2000) “Clinical Use of Reproductive Tract Scoring to Predict Pregnancy Outcome”, Iowa State University Animal Industry Report 1(1).