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首页> 外文期刊>The Indian Journal of Animal Reproduction >ESTRUS INDUCTION AND FERTILITY RESPONSE IN POSTPARTUMANESTRUS GIR COWS
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ESTRUS INDUCTION AND FERTILITY RESPONSE IN POSTPARTUMANESTRUS GIR COWS

机译：产后雌性GIR母牛的发情诱导和生殖反应

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The study was aimed at induction/synchronization of estrus in suckler postpartum anoestrus/ suboestrus Gir cows (n=18) of an organized farm. The anoestrus/suboestrus cows were divided into 3 equal groups each of 6 animals, and a group of 6 normal cyclic cows was kept as control. Three standard synchronization protocols initiated around day 90 to 92 postpartum were CIDR, Ovsynch, and Cosynch, considering the day of first GnRH injection or CIDR insertion as day 0. The animals were bred by fixed-time Al(FTAI). Pregnancy was confirmed per rectum on day 45 post-AI. Plasma progesterone was estimated by RIA on day 0 (day of first treatment), 7 (day of PG injection), 9/10 (day of estrus/AI) and on day 10, 20, 30 and 40 post-AI. The estrus induction response as noted by uterine tone and mucus discharge was 100% in all 3 groups, but the behavioural signs were observed in 83.33,83.33 and 100.00 % of cows under CIDR, Ovsynch and Co-synch protocols, respectively. The conception rates at induced estrus (FTAI) in CIDR, Ovsynch and Cosynch protocol were 50.00,50.00 and 33.33 %, respectively. The corresponding overall conception rates of 2 cycles post-treatment were 83.33 (5/6), 66.66 (4/6), and 83.33 (5/ 6) %. In control group, the first service and overall conception rates were 33.33 and 66.66 (4/6) %, respectively. The results were the best with CIDR, followed by Cosynch and Ovsynch protocol. The plasma progesterone (ng/ ml) concentrations were significantly (PO.05) higher on day 7 in CIDR (6.65±2.43 ng/ml),Ovsynch (3.51 ng/ml) and Cosynch (6.27±0.92 ng/ml) protocols as compared to the corresponding values obtained on day 0 and 9/10 (Al) for the same protocols. However, the progesterone values on day 10, 20, 30 and 40 post-AI did not differ significantlybetween these groups and even from control group. Mean (± SE) values of plasma progesterone (ng/ ml) on day 20 and 30 post-AI were higher (P<0.05) in conceived cows than the non-conceived cows. These results suggest that use of CIDR and Cosynch protocols may serve as an excellent tool for induction/synchronization of estrus and improvement of conception rate in postpartum anestrus/subestrus Gir cows.
机译：该研究的目的是在一个有组织的农场的产后无乳/发情下的带壳奶牛（n = 18）中诱导/同步发情。将花粉动情期/亚发情期奶牛分成3组，每组6只动物，每组6只正常的循环奶牛作为对照。考虑到首次GnRH注射或CIDR插入的日期为第0天，在产后90至92天左右开始的三种标准同步方案是CIDR，Ovsynch和Cosynch。将动物用固定时间的Al（FTAI）进行饲养。在AI后第45天确认了每个直肠的怀孕。在RI后第0天（首次治疗日），第7天（PG注射日），9/10（发情/ AI日）和第10、20、30和40天通过RIA估计血浆孕酮。在所有3组中，子宫音和粘液排出均表明发情诱导反应为100％，但在CIDR，Ovsynch和Co-synch方案下，分别在83.33％，83.33％和100.00％的母牛中观察到了行为迹象。 CIDR，Ovsynch和Cosynch协议中的诱导发情（FTAI）受孕率分别为50.00、50.00和33.33％。治疗后2个周期的相应总受孕率分别为83.33（5/6），66.66（4/6）和83.33（5/6）％。对照组中，首次服务和总体受孕率分别为33.33％和66.66（4/6）％。使用CIDR的结果最好，其次是Cosynch和Ovsynch协议。在第7天，CIDR（6.65±2.43 ng / ml），Ovsynch（3.51 ng / ml）和Cosynch（6.27±0.92 ng / ml）的血浆中孕酮浓度（ng / ml）显着升高（PO.05），与第0天和第9/10（A1）天针对相同协议获得的相应值进行比较。然而，这些组之间甚至与对照组之间在AI后第10、20、30和40天的孕酮值没有显着差异。人工授乳后第20天和30天血浆孕酮的平均（±SE）值（ng / ml）高于未受孕的母牛（P <0.05）。这些结果表明，CIDR和Cosynch协议的使用可能是诱导/同步发情和提高产后发情期/亚发情期Gir牛受孕率的绝佳工具。

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