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Journals / Manas Journal of Agriculture Veterinary and Life Sciences / 2026 / Cilt: 16 Sayı: 1

Effects of Combined hCG and eCG Administration on Fertility in Progesterone-Treated Akkaraman Ewes During the Breeding Season

Üreme Sezonunda Progesteronla Tedavi Edilen Akkaraman Koyunlarında Kombine hCG ve eCG Uygulamasının Fertilite Parametreleri Üzerine Etkileri

Merve Yilmaz0000-0001-6820-9802
Semra Kaya(KAFKAS ÜNİVERSİTESİ)0000-0002-7520-6631
Pages
50–63
Publication Date
2026-06-23
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

In conclusion, eCG+hCG administration numerically improved reproductive performance but was not statistically significant.

📌 3 Key Takeaways

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Objective & Hypothesis:This study aimed to investigate the effect of concurrent hCG injection with eCG in a short-term (7-day) progesterone-based synchronization protocol on fertility parameters and economic profitability during the breeding season of Akkaraman sheep. 110 Akkaraman ewes were used in the study.
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Key Findings & Data:The sheep were randomly allocated into 3 groups: Group I received 400 IU eCG, Group II received 200 IU hCG, and Group III received 400 IU eCG+200 IU hCG.
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Conclusion & Impact:In conclusion, eCG+hCG administration numerically improved reproductive performance but was not statistically significant.
🔬Design:Araştırma Makalesi
📍Scope:Comprehensive Sample
⚙️Variables:Akkaraman koyunu · eCG · hCG

Abstract

This study aimed to investigate the effect of concurrent hCG injection with eCG in a short-term (7-day) progesterone-based synchronization protocol on fertility parameters and economic profitability during the breeding season of Akkaraman sheep. 110 Akkaraman ewes were used in the study. A sponge impregnated with progesterone was inserted into the vagina of all ewes, and cloprostenol was administered one day before, and on the day the sponge was removed. The sheep were randomly allocated into 3 groups: Group I received 400 IU eCG, Group II received 200 IU hCG, and Group III received 400 IU eCG+200 IU hCG. The rams were incorporated into the flock on day 8 of the study. Pregnancy examinations were performed 30±3 days after mating. Estrus rates were determined as 91.7%, 86.1%, and 94.6% in the groups (Group I, Group II, Group III), respectively. The pregnancy and lambing rates in the group were determined as 80.6% and 96.6%, 75% and 88.9%, and 86.5% and 93.8%, respectively (P>0.05). Multiple lambing rates were determined as 42.9%, 20.8%, and 56.7% (P=0.008). Litter size was determined as 1.54, 1.21, and 1.77, respectively. In conclusion, eCG+hCG administration numerically improved reproductive performance but was not statistically significant. Only the increase in multiple lambing rate was significant compared to the hCG group.

Özet

Bu çalışma, üreme sezonunda Akkaraman koyunlarında uygulanan kısa süreli (7 gün) progesteron temelli senkronizasyon protokolünde eCG ile birlikte uygulanan hCG enjeksiyonunun fertilite parametreleri ve ekonomik kârlılık üzerindeki etkilerini değerlendirmek amacıyla yapıldı. Çalışmada toplam 110 Akkaraman koyunu kullanıldı. Tüm koyunlara progesteron emdirilmiş vajinal sünger yerleştirildi ve süngerlerin çıkarılmasından bir gün önce ve çıkarıldığı gün kloprostenol uygulandı. Koyunlar rastgele üç gruba ayrıldı: Grup I’e 400 IU eCG, Grup II’ye 200 IU hCG ve Grup III’e 400 IU eCG + 200 IU hCG uygulandı. Koçlar çalışmanın 8. gününde sürüye katıldı. Gebelik muayeneleri çiftleşmeden 30±3 gün sonra yapıldı. Östrus oranları sırasıyla Grup I, Grup II ve Grup III’te %91,7, %86,1 ve %94,6 olarak belirlenmiştir. Gebelik ve kuzulama oranları ise gruplarda sırasıyla %80,6 ve %96,6; %75,0 ve %88,9; %86,5 ve %93,8 olarak saptanmış olup, gruplar arasındaki fark istatistiksel açıdan anlamlı bulunmamıştır (P>0,05). Çoklu doğum oranları sırasıyla %42,9, %20,8 ve %56,7 olarak belirlenmiş ve bu farkın istatistiksel olarak anlamlı olduğu görülmüştür (P=0,008). Litter büyüklüğü (kuzu sayısı) ise sırasıyla 1,54, 1,21 ve 1,77 olarak hesaplanmıştır. Sonuç olarak, eCG+hCG uygulamasının üreme performansı üzerinde sayısal bir iyileşme sağladığı gözlenmekle birlikte, bu artış genel olarak istatistiksel açıdan anlamlı değildir. Bununla birlikte, çoklu doğum oranındaki artışın özellikle hCG grubuna kıyasla anlamlı olduğu belirlenmiştir.

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Cite This Article

Yilmaz, M., Kaya, S. (2026). Effects of Combined hCG and eCG Administration on Fertility in Progesterone-Treated Akkaraman Ewes During the Breeding Season. Manas Journal of Agriculture Veterinary and Life Sciences, Cilt: 16 Sayı: 1, 50–63. https://doi.org/10.53518/mjavl.1872494

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