Influence of negative energy balance on the reproductive performance after treatment of cystic ovarian disease with gonadotrophin-releasing hormone in dairy cows
作者： G. A. Hooijer , M. A. A. J. Oijen , K. Frankena , J. P. T. M. Noordhuizen
DOI: 10.1111/J.1439-0442.2005.00733.X
关键词: Insemination 、 Endocrinology 、 Balance (ability) 、 Fertility 、 Medicine 、 After treatment 、 Herd 、 Internal medicine 、 Hormone 、 Animal science 、 Ice calving 、 Lactation
摘要: The aim of this study was to investigate whether a significant relation exists between the presence negative energy balance (NEB) in cows early lactation and reproductive performance after treatment with gonadotrophin-releasing hormone clinical cystic ovarian disease. Reproductive assessed from interval first insemination (ITFI) conception (ITC). Based on outcome daily change milk fat yield (Deltafatg) second recordings post-partum, were considered have passed NEB nadir (positive Deltafatg) or not (negative Deltafatg). Lactations (n = 430) divided into four groups according calving recording (ICMR): (i) 0-9 days; (ii) 10-19 (iii) 20-29 (iv) 30-49 days. NEB-proxy parameter determined. A interaction existed for 1 3 (ICMR days post-partum respectively) an increased decreased probability being inseminated day respectively. However, no found Deltafatg regard ITC.
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