Effects of Progesterone or Progesterone and GnRH Administration on Blood Serum Progesterone, Estradiol and Luteinizing Hormone in Prepuberal Beef Heifers
1994
- 25Usage
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Citation Benchmarking is provided by Scopus and SciVal and is different from the metrics context provided by PlumX Metrics.
Metrics Details
- Usage25
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- Abstract Views1
Report Description
A study using twelve prepuberal Angus heifers was conducted to determine the effects that synthetic progesterone with or without gonadotropin-releasing hormone (GnRH) had on blood serum concentrations of progesterone, estradiol, and luteinizing hormone (LH) over a 48-hour period. Four heifers were given an implant containing the synthetic progestogen norgestomet for 9 days. Four other heifers were given a similar implant and also received an injection of GnRH after implant removal. The remaining four heifers served as controls and received no treatment. Serum progesterone and estradiol concentrations did not differ between treatments (P> .8). Heifers receiving norgestomet and GnRH had increased levels of serum luteinizing hormone (LH) during the 4.5 hours following the injection (P< .0001). Serum LH concentrations in heifers treated with norgestomet only did not differ from those of controls.
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