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首页> 外文期刊>African Journal of Biotechnology >Effect of gonadotropin-releasing hormone (GnRH) treatment on multiple births in Afshari ewes
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Effect of gonadotropin-releasing hormone (GnRH) treatment on multiple births in Afshari ewes

机译：促性腺激素释放激素（GnRH）处理对阿富汗母羊多胎的影响

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The purpose of this study was to investigate the effects of?gonadotropin-releasing hormone?(GnRH) administration on the induction of multiple births in synchronized Afshari ewes.?16 cycling, multiparous fat-tailed Iranian Afshari ewes, weighing 66.5 ± 2.5 kg, were used in the trail. Estrus was synchronized using?controlled internal drug release?CIDR’s; inserted for 14 days.?Pregnant mare serum gonadotrophin(PMSG) (300 IU) was injected to ewes a day before CIDR removal. The ewes was randomly allocated to two groups (n = 8). Synchronization treatment was initiated with a week interval in two groups (weeks 1 and 2).?24 h following CIDR removal (day 1), GnRH (50 μg) was administered to?half of each group ewes (GnRH and control groups),?and?ewes mated with the proven rams.?Pregnancy was diagnosed with the aid of transabdominal ultrasonograpy 30 days after mating.?Ovarian follicular activity was monitored with the aid of transrectal ultrasonograpy on the days of CIDR removal and at estrus (approximately day 1).?Following PMSG treatment, the mean number of large follicles on total ovaries increased from CIDR removal to estrus 1.48 ± 0.71 vs. 2.85 ± 0.82 (P < 0.05). Lambing rate in GnRH group (162.5%) was higher?(P < 0.05)?compared to the control group (125%).?The mean weights of lambs born in the GnRH and control groups were 5.5 ± 0.1 and 5.2 ± 0.1, respectively.
机译：这项研究的目的是研究施用促性腺激素释放激素（GnRH）对同步化的阿富汗母羊多胎诱导的影响。16骑自行车的多尾脂肪尾伊朗阿富汗母羊，重66.5±2.5 kg，被用于线索。发情期使用“受控内部药物释放” CIDR进行同步;植入CID前一天，将母马血清促性腺激素（PMSG）（300 IU）注射到母羊上，然后再去除CIDR。将母羊随机分为两组（n = 8）。在两组（第1周和第2周）中以每周间隔开始同步治疗。在去除CIDR后第24小时（第1天），对每组母羊的一半（GnRH和对照组）给予GnRH（50μg），交配后30天经腹部超声诊断出妊娠。在CIDR摘除当天和发情期（约第1天），经直肠超声检查监测卵巢的卵泡活动。 ）。在PMSG治疗之后，从CIDR去除到发情期，大卵巢上的大卵泡平均数量增加了1.48±0.71对2.85±0.82（P <0.05）。 GnRH组的羔羊发生率（162.5％）高于对照组（125％）（P <0.05）。GnRH组和对照组的羔羊平均体重分别为5.5±0.1和5.2±0.1，分别。

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