ArticleOpen veterinary journal2025
Manipulating seasonality by using PMSG and Kisspeptin hormones and the impact of the MTNR1A gene on reproduction efficiency in ewes.
Article in Open veterinary journal, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: One of the most important problems in sheep is seasonal anestrus, which limits the reproductive efficiency of the sheep. Estrous synchronization is considered the first plan for reproductive performance in sheep due to the pregnancy time is limited, and parturition as well as an increase in twining and reached good genetic characteristics. Aim: This study aimed to manipulate seasonality that limits fertility in ewes by induction estrus during seasonal anestrous in sheep by using Pregnant Mare Serum Gonadotropin (PMSG), Kisspeptin hormone, and study the impact of MTNR1A gene on reproduction efficiency in ewes. Methods: This study examined 36 Awassi ewes divided into two groups, each containing 18 ewes, 2-3 years old, and two fertile rams aged 3-4 years and weighing 60-65 kg. All non-pregnant ewes were synchronized using vaginal sponges (60 mg Medroxy Progesterone acetate) for 10 days. The injection of treatment when sponges are draws. The first group (G1) received 500 IU of PMSG injection, and the second group (G2) injection a Kisspeptin hormone 5 μg/kg B.W. Results: The results showed the G1 treated by PMSG 500IU were higher significantly ( Conclusion: In conclusion, the application of PMSG and Kisspeptin was effective in achievement good higher significantly of reproduction efficiency in this study. The genotypes CT and TT of the MTNR1A gene polymorphism were connected with a short significant of days to lambing in genotypes.
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