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A Comparative Study between Intravaginal Sponges and Prostaglandin Injection and their effect on Lambing rate and Birth rate in Awassi sheep.

دراسة مقارنة بين استخدام الإسفنجات المهبلية وحقن البروستاغلاندين وتأثيرهما في نسبة الولادات ومعدل المواليد لدى الأغنام العواس

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 Publication date 2020
  fields Veterinary Medicine
and research's language is العربية
 Created by محمد الرز




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The objective of this study was to compare the effect of using intravaginal sponges with intramuscular (IM) injection of prostaglandin hormone within the reproductive season and their effect on Lambing rate and birth rate in Awassi ewes. Thirty ewes were equally divided into two groups (G1 and G2). Intravaginal sponges impregnated with 60 mg of Medroxy Progesterone Acetate (MAP) were inserted into the ewes of the first group for 14 days, and were injected at the time of the withdrawal of sponges with 500 IU of equine Chorionic Gonadotrophin (eCG) at the first group ewes (G1). The ewes in second group (G2) were injected with double dose of 125 μg of prostaglandin (PGF2α) intramuscularly (IM) at 9 days apart. The ewes were naturally mated with fertile rams (ram / 5 ewes). The results showed that there were significant differences between groups (G1 and G2) in the Lambing rate (93.33% vs. 73.33%). The ewes of group (G1) outperformed the ewes of group (G2) in the percentage of twin births (42.86% vs. 18.18%), and the birth rate (1.43 vs. 1.18) with significant differences (P<0.05). We conclude from the study that treating ewes by using intravaginal sponges with eCG injection was better than the method of prostaglandin injection in raising the Lambing rate and birth rate in Syrian Awassi ewes, within the local Syrian conditions


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Research summary
تهدف هذه الدراسة إلى مقارنة تأثير استخدام الإسفنجات المهبلية المشبعة بميدروكسي بروجستيرون أسيتات (MAP) والحقن العضلي لهرمون البروستاغلاندين على نسبة الولادات ومعدل المواليد لدى الأغنام العواس. تم تقسيم 30 نعجة إلى مجموعتين متساويتين (G1 وG2). تم استخدام الإسفنجات المهبلية المشبعة بـ 60 ملغ من MAP لمدة 14 يوماً وحقن 500 وحدة دولية من هرمون eCG عند سحب الإسفنجات في المجموعة الأولى (G1). في المجموعة الثانية (G2)، تم حقن النعاج بجرعتين من 125 ميكروغرام من البروستاغلاندين بفاصل 9 أيام. أظهرت النتائج فروقاً معنوية بين المجموعتين في نسبة الولادات (93.33% مقابل 73.33%)، وتفوقت نعاج المجموعة (G1) في نسبة الولادات التوأمية (42.86% مقابل 18.18%) ومعدل المواليد (1.43 مقابل 1.18). نستنتج من الدراسة أن معالجة النعاج باستخدام الإسفنجات المهبلية مع حقن هرمون eCG كانت أفضل من طريقة حقن هرمون البروستاغلاندين في رفع نسبة الولادات ومعدل المواليد في الأغنام العواس ضمن الظروف المحلية السورية.
Critical review
دراسة نقدية: تقدم هذه الدراسة معلومات قيمة حول تأثير استخدام الإسفنجات المهبلية وحقن البروستاغلاندين على نسبة الولادات ومعدل المواليد لدى الأغنام العواس. ومع ذلك، يمكن تحسين الدراسة من خلال زيادة حجم العينة لتشمل عدد أكبر من النعاج، مما يعزز من دقة النتائج ويجعلها أكثر تمثيلاً. كما يمكن أن تكون هناك حاجة إلى دراسة تأثير العوامل البيئية والغذائية على النتائج، حيث أن هذه العوامل قد تؤثر بشكل كبير على الكفاءة التناسلية. بالإضافة إلى ذلك، يمكن أن تكون هناك حاجة إلى مقارنة تأثير هذه العلاجات في فصول مختلفة من السنة لمعرفة ما إذا كانت هناك اختلافات موسمية في النتائج.
Questions related to the research
  1. ما هو الهدف الرئيسي من هذه الدراسة؟

    الهدف الرئيسي هو مقارنة تأثير استخدام الإسفنجات المهبلية المشبعة بميدروكسي بروجستيرون أسيتات (MAP) والحقن العضلي لهرمون البروستاغلاندين على نسبة الولادات ومعدل المواليد لدى الأغنام العواس.

  2. ما هي النتائج الرئيسية التي توصلت إليها الدراسة؟

    أظهرت النتائج أن نسبة الولادات كانت أعلى في المجموعة التي استخدمت الإسفنجات المهبلية مع حقن هرمون eCG (93.33%) مقارنة بالمجموعة التي استخدمت حقن البروستاغلاندين (73.33%). كما كانت نسبة الولادات التوأمية ومعدل المواليد أعلى في المجموعة الأولى.

  3. ما هي التوصيات التي قدمتها الدراسة؟

    أوصت الدراسة بإجراء المزيد من الدراسات باستخدام برنامجي توقيت الشبق على أعداد أكبر من النعاج، وكذلك إجراء المزيد من الدراسات باستخدام هرمون البروستاغلاندين على الأبقار والماعز.

  4. ما هي العوامل التي يمكن أن تؤثر على نتائج الدراسة؟

    العوامل البيئية والغذائية، وكذلك اختلاف الفصول والسلالات، يمكن أن تؤثر بشكل كبير على الكفاءة التناسلية ونتائج الدراسة.


References used
El-Sherry, T. M., Derar, D. R., Hayder, M., Hamdon, H., Saifelnasr, E. (2012). Effect Of Progesterone And Prostaglandin Analogue-Based Synchronization Programs On The Follicular Dynamics And Conception Rate At Two Different Breeding Seasons In Subtropical Ewes. Assiut Vet. Med. J., 58: 135
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The objective of this study was to compare between two methods of estrus synchronization (progesterone-impregnated intravaginal sponges and intramuscular (IM) injection of prostaglandin hormone) within the reproductive season and their effect on some reproductive parameters in Awassi ewes. Thirty ewes were equally divided into two groups (G1 and G2). Intravaginal sponges impregnated with 60 mg of Medroxy Acetate Progesterone (MAP) were inserted into the ewes of the first group for 14 d, and were injected at the time of the withdrawal of sponges with 500 IU of equine Chorionic Gonadotrophin (eCG) at the first group ewes (G1). The animals in second group (G2) were injected with double dose of 125μg of prostaglandin (PGF2α) intramuscularly (IM) at 9 days apart. The ewes were naturally mated with fertile rams (ram / 5 ewes). The results showed that there were no significant differences between groups (G1 and G2) in the estrus response (100% and 86.67%, respectively), while there were significant differences in the average time to onset of estrus (38.8 ± 4.45 h and 53.07 ± 4.13 h) and the average duration of estrus (33.20 ± 3.09 h and 28.61 ± 3.59 h, respectively). Also, the pregnancy rate was significant difference (P<0.05) in group G1 compared to group G2 (93.33% vs. 73.33%). we conclude from the study that the estrus synchronization using intravaginal sponges is an effective method to achieve good reproductive performance ewes and get a high estrus rate and high pregnancy rate, compared to the injection of the hormone prostaglandin in Awassi ewes, within the local Syrian conditions.
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