von Straaten H, Klocke P, Lange A, von Fehrn S, Glatzel P
Tierklinik für Fortpflanzung, Freie Universität Berlin.
Berl Munch Tierarztl Wochenschr. 1997 Sep;110(9):333-6.
The presented study was made to determine the factors influencing the fertility supporting effect of GnRH application at the time of insemination in a dairy herd with fertility problems. The metabolic parameters considered influencing conception results were milk yield, milk protein and milk fat and for blood parameters Urea, GOT and Bilirubin. The total effect of GnRH consisted in an improved pregnancy rate by 18.8% compared to the non treated control group. The improvement of pregnancy rate was observed mainly in groups with an adequate supply of energy at the time of insemination. Therefore the use of GnRH at insemination time is more successful, when milking test data and blood parameters are taken into account and indicate an equilibrated supply in energy. To explain these effects endocrinological regulation models are discussed.
本研究旨在确定在一个存在繁殖问题的奶牛群中，授精时应用促性腺激素释放激素（GnRH）对繁殖支持效果的影响因素。被认为会影响受孕结果的代谢参数包括产奶量、乳蛋白和乳脂肪，血液参数包括尿素、谷草转氨酶（GOT）和胆红素。与未处理的对照组相比，GnRH的总体效果是使妊娠率提高了18.8%。妊娠率的提高主要在授精时能量供应充足的组中观察到。因此，当考虑到挤奶测试数据和血液参数并表明能量供应平衡时，授精时使用GnRH会更成功。为了解释这些影响，讨论了内分泌调节模型。
