Browsing Production Animal Studies by Subject "Heifer selection"

Now showing items 1-3 of 3

Evaluation of pre-breeding reproductive tract scoring as a predictor of long term reproductive performance in beef heifers

Holm, Dietmar Erik; Nielen, Mirjam; Jorritsma, R.; Irons, Pete Charles; Thompson, P.N. (Peter N.) (Elsevier, 2015-01)

In a 7-year longitudinal study 292 Bovelder beef cows in a restricted breeding system inSouth Africa were observed from 1 to 2 days before their first breeding season, when repro-ductive tract scoring (RTS, scored from 1 ...
A new application of pelvis area data as culling tool to aid in the management of dystocia in heifers

Holm, Dietmar Erik; Webb, E.C. (Edward Cottington); Thompson, P.N. (Peter N.) (American Society of Animal Science, 2014-11)

Although fetomaternal disproportion is the major cause of dystocia in heifers, pelvis area (PA) is not recommended as a culling tool due to its relatively low importance and genetic correlation with calf birth weight ...
Ultrasonographic reproductive tract measures and pelvis measures as predictors of pregnancy failure and anestrus in restricted bred beef heifers

Holm, Dietmar Erik; Nielen, Mirjam; Jorritsma, R.; Irons, Pete Charles; Thompson, P.N. (Peter N.) (Elsevier, 2016-02)

Previous reports have shown that reproductive tract score (RTS) can predict reproduction outcomes in seasonally bred beef heifers, although the accuracy can vary. Some ultrasonographic measures of the female reproductive ...

Now showing items 1-3 of 3

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