Evaluation of hormones as candidate early biomarkers of Holstein bull performance around the first semen collection at artificial insemination centres
Ina Leiter,
Victoria Mittmann,
Marie‐Kristin Schaper
et al.
Abstract:Artificial insemination (AI) centres select bulls as calves according to their genetic breeding values and raise them until the first semen collection; yet, a high dropout rate of reared bulls is a problem for AI centres. Potential hormonal indicators of bull sexual maturation (cortisol, dehydroepiandrosterone (DHEA), testosterone, oestradiol, insulin‐like growth factor 1 (IGF‐1)) were observed and evaluated in relation to the performance parameters to perhaps identify candidate biomarkers allowing an early se… Show more
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