Article
Genetic merit for fertility traits in Holstein cows: V. Factors affecting circulating progesterone concentrations.
Journal of dairy science - 1 Sept 2014
Moore S G, Scully S, Browne J A, Fair T, Butler S T
Abstract excerpt
This study investigated the factors affecting circulating progesterone (P4) concentrations in cows with similar genetic merit for milk production traits, but with extremes of good (Fert+) or poor (Fert-) genetic merit for fertility traits. Study 1: 28 cows were enrolled in an ovulation synchronization protocol at 61±13 (±standard deviation) days postpartum, and data are presented for 13 Fert+ and 9 Fert- cows...
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