The Effects of Short and Long Term Medroxy Progesterone Acetate (MAP) Sponge Treatments on Reproductive Performance during the Non-Breeding Season of Arabian Ewes
محورهای موضوعی : CamelP. Sareminejad 1 , S. Tabatabaei 2 , M. Mamouei 3 , K. Mirzadeh 4 , M. Boujarpour 5
1 - Department of Animal Science, Faculty of Animal and Food Science,Ramin Agricultural and Natural Resources University, Mollasani, Ahvaz, Iran
2 - Department of Animal Science, Faculty of Animal and Food Science,Ramin Agricultural and Natural Resources University, Mollasani, Ahvaz, Iran
3 - Department of Animal Science, Faculty of Animal and Food Science,Ramin Agricultural and Natural Resources University, Mollasani, Ahvaz, Iran
4 - Department of Animal Science, Faculty of Animal and Food Science,Ramin Agricultural and Natural Resources University, Mollasani, Ahvaz, Iran
5 - Department of Animal Science, Faculty of Animal and Food Science,Ramin Agricultural and Natural Resources University, Mollasani, Ahvaz, Iran
کلید واژه: reproductive performance, Arabic ewes, MAP sponge, non-breeding season,
چکیده مقاله :
The aim of this study was to evaluate the reproductive efficiency of short and long term treatment with progestagens in addition to pregnant mare serum gonadotropin (PMSG) in Arabian ewes during the non-breeding season. A total of 56 ewes were divided into three groups: in group I vaginal sponges (60 mg medroxy progesterone acetate; MAP) were applied and removed after 6 days; in group II, vaginal MAP sponges were removed 14 days following insertion while group III served as control group. The first two groups were intramuscularly injected with of 600 IU PMSG, following sponge removal. Parameters such as estrus response rate, duration of estrus, pregnancy rate and fecundity were evaluated. There were no significant differences in estrus response rate and fecundity rate between groups I and II (P>0.05). However, differences were significant when these two treatment groups were coMAPred with control group. In group I, duration of estrus was significantly higher than group II (P<0.05). In addition, pregnancy rate in group I was significantly higher than group II (P<0.05). It was concluded that short-term sponge treatment (6 days) had better performance when coMAPred with long-term sponge treatment (14 days) in Arabian ewes.
هدف از این مطالعه، بررسی راندمان تولید مثل درمان‌های کوتاه و بلند مدت پروژسترونی به همراه هورمون PMSG در میش‌های عربی در خارج از فصل تولید مثل بود. در مجموع 56 رأس گوسفند ماده به سه گروه تقسیم شدند. در گروه اول، اسفنج داخل واژنی (60 میلی‌گرم مدروکسی پروژسترون استات، MAP) به مدت 6 روز در داخل واژن باقی ماند، در گروه دوم، اسفج مدروکسی پروژسترون استات به مدت 14 روز در واژن باقی ماند و گروه سوم، نیز به عنوان گروه کنترل در نظر گرفته شد. به دو گروه اول، پس از برداشت اسفنج میزان 600 واحد بین المللی (IU) هورمون PMSG به صورت عضلانی تزریق شد. پارامترهایی از جمله، میزان پاسخ فحلی، مدت فحلی، میزان آبستنی و میزان تزاید بین گروه‌ها مورد ارزیابی قرار گرفت. تفاوت معنی‌داری در میزان پاسخ فحلی و میزان تزاید بین دو گروه اول و دوم وجود نداشت (05/0<P). با این حال، دو گروه درمانی در مقایسه با گروه کنترل تفاوت معنی‌داری داشتند. در گروه اول، طول مدت فحلی به طور قابل توجهی بیشتر از گروه دوم بود (05/0>P). علاوه بر این، میزان آبستنی نیز در گروه اول به طور معنی‌داری بالاتر از گروه دوم بود (05/0>P). نتیجه‌گیری شد که درمان کوتاه مدت اسفنج (6 روز) در مقایسه با درمان بلند مدت (14 روز) در میش‌های عربی عملکرد بهتری دارد
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