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首页> 外文期刊>The Indian Journal of Animal Reproduction >EFFECT OF hCG BEFORE, DURING AND AFTER INDUCED ESTRUS ON CONCEPTION AND PROGESTERONE IN REPEAT BREEDER COWS
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EFFECT OF hCG BEFORE, DURING AND AFTER INDUCED ESTRUS ON CONCEPTION AND PROGESTERONE IN REPEAT BREEDER COWS

机译：hCG诱导发情期前后对重复育种母猪概念和孕酮的影响

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摘要

The repeat breeding syndrome in cows is the most commonly encountered and poorly understood condition causing economic loss to the farmers. A total of 64 repeat breeder cows were treated with 0.98 mg of Tiaprost on day 10 following natural estrus andwere equally divided into 4 groups as PG-N, PG-P, PG-O and PG-E and were treated with no hCG, 15001U hCG at 24 hrs before first Al, at first Al and at 4 days following first Al, respectively. Sixteen untreated repeat breeder cows served as control. In the treated cows Al was done at 72 (first Al) and 96 hrs (Second Al) after PGF_(2alpha) injection. In control group, Al was carried out twice at 24 hrs interval in natural estrus. Blood was collected at different phases of treatment for progesterone assay.First service conception rates obtained were 43.75,43.75,62.50 and 37.50 per cent in PG-N, PG-P, PG-0 and PG-E, respectively and the same in control was18.75 per cent. The overall mean level (ng/ml) of serum progesterone at the time of natural estrus, PGF_(2alpha) injection, induced estrus and at 2nd, 4th and 6th day following first Al in cows which became pregnant was 0.36±0.08, 7.19+0.46, 0.18±0.05, 1.05±0.20, 1.70±0.22 and 3.37±0.77 and corresponding values in non pregnant cows were 0.51 ±0.09, 5.24±0.43, 0.23±0.03, 0.57±0.15, 0.99±0.27 and 1.62±0.26, respectively. It is concluded that PGF_(2alpha) in combination with hCG at Al, improved the conception rate in repeat breeder cows.
机译：奶牛的重复繁殖综合症是最常见的病情，对病情知之甚少，给农民造成了经济损失。在自然发情后的第10天，总共有64头重复繁殖的母牛用0.98 mg的Tiaprost处理，并被分为PG-N，PG-P，PG-O和PG-E 4组，不使用hCG，15001U进行处理在第一个A1之前的24小时，在第一个A1和在第一个A1之后的第4天的hCG。十六只未经处理的重复育种牛作为对照。在治疗的母牛中，在注射PGF_（2α）后的72（第一Al）和96小时（第二Al）进行Al。在对照组中，在自然发情中以24小时的间隔进行两次Al。在治疗的不同阶段收集血液进行孕酮检测.PG-N，PG-P，PG-0和PG-E的首次服务受胎率分别为43.75％，43.75、62.50和37.50％，而对照组则相同是18.75％。天然发情，注射PGF_（2α），诱发发情时以及怀孕的第一胎Al后第2、4和6天时血清孕酮的总体平均水平（ng / ml）为0.36±0.08、7.19 + 0.46、0.18±0.05、1.05±0.20、1.70±0.22和3.37±0.77，非怀孕母牛的对应值分别为0.51±0.09、5.24±0.43、0.23±0.03、0.57±0.15、0.99±0.27和1.62±0.26 。结论是PGF_（2α）与hCG在Al处的结合提高了复种母牛的受胎率。

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