Hormonal regulation of the onset of puberty in purebred and crossbred Holstein and Jersey heifers
The objective of this study was to determine the onset of puberty by using progesterone profiles and anterior pituitary gonadotropin releasing hormone (GnRH) challenges in purebred and crossbred Holstein and Jersey heifers. In experiment 1, fifty prepubertal heifers by four sire - dam classificatio...
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Virginia Tech
2014
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| Online Access: | http://hdl.handle.net/10919/34239 http://scholar.lib.vt.edu/theses/available/etd-07292005-151652/ |