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首页> 外文期刊>The Indian Journal of Animal Reproduction >SYNCHRONIZATION OF OVULATION IN POSTPARTUMSAHIWAL COWS*
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SYNCHRONIZATION OF OVULATION IN POSTPARTUMSAHIWAL COWS*

机译：产后奶牛排卵的同步*

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摘要

Present investigation was conducted to evaluate two different Ovsynch protocols for synchronization of ovulation in postpartum Sahiwal cows. Experimental animals (n=12) were randomly divided in to 2 groups; each group consisted of 6 animals. Animals of group I were treated with traditional Ovsynch protocol, while animals of group II were treated with a modified Ovsynch protocol where first GnRH injection was replaced with hCG. Treated animals were inseminated at fixed time of 14 to 20 hrs after second GnRH injection without estrus detection. Blood sample were collected from the experimental animals on days -10,0,8 and 16 of Ovsynch protocol (day 60 postpartum = day 0 of Ovsynch protocol) to estimate serum progesterone concentrations. Animals were classified as cyclic (n=8, P4 e" 1 ng/ml) and acyclic (n=4, P4 < 1 ng/ml) based on serum progesterone concentration on days -10 and 0. Response to treatment was assessed in treated animals on the basis of progesterone concentration on day 8 (PG treatment);83.3% (5/6) animals responded to first GnRH treatment in group I and 100% (6/6) animals responded to hCG treatment in group II. Two cyclic animals each from both the treatment groups got conceived to fixed time Al giving conception rate of 40% (2/5) ingroup I and 33.3% (2/6) in group II. Three cyclic and 4 acyclic animals did not conceive after responding to treatment, while one cyclic animal did not respond to first GnRH treatment. No any beneficial effect of replacing first GnRH injection with hCG could be obtained in ovulation synchronization and conception rate with Ovsynch protocol in Sahiwal cows during early postpartum period.
机译：目前进行的调查旨在评估两种不同的Ovsynch协议，以同步产后Sahiwal母牛的排卵。实验动物（n = 12）随机分为2组。每组由6只动物组成。第一组的动物用传统的Ovsynch方案治疗，而第二组的动物用改良的Ovsynch方案治疗，其中第一次GnRH注射用hCG代替。在第二次GnRH注射后的14至20小时的固定时间对受治疗的动物进行授精，而未发情。在Ovsynch方案的-10、0、8和16天（产后60天= Ovsynch方案的第0天）从实验动物中采集血样，以评估血清孕酮浓度。根据第-10天和第0天的血清孕酮浓度，将动物分为环状（n = 8，P4 e“ 1 ng / ml）和非环状（n = 4，P4 <1 ng / ml）。以第8天的孕激素浓度为基础来治疗的动物（PG处理）; I组中的83.3％（5/6）动物对首次GnRH治疗有反应，II组中100％（6/6）的动物对hCG治疗有反应。两个治疗组中的周期性动物均受固定时间A1的孕育，I组受孕率为40％（2/5），II组为33.3％（2/6），三只周期性和4只无周期动物在反应后未受孕在治疗中，一只周期性动物对第一次GnRH的治疗没有反应，在产后早期，在Sahiwal奶牛中，用Ovsynch方案在排卵同步化和受胎率上没有获得任何有益的效果，用hCG代替首次GnRH注射。

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