Keçilerde Çiftleşmeden Sonra 8-16. Günler Arasında Uygulanan Progesteron Takviyesinin Üreme Performansı Üzerine Etkileri

Öz

Bu çalışma, keçilerde çiftleşme sonrasında uygulanan progesteronun gebelik oranı ve doğumda elde edilen kuzu sayısı üzerindeki etkilerini belirlemek amacıyla gerçekleştirilmiştir. Araştırmada senkronizasyon protokolüne dahil edilen keçiler; kontrol ve progesteron uygulama grubu olarak iki gruba ayrılmıştır. Çiftleşmenin ardından çalışma grubundaki hayvanlara erken gebelik dönemini desteklemek amacıyla çiftleşmeden sonra 8. günde progesteron emdirilmiş intravajinal sünger uygulanmış ve bu süngerler 16. günde çıkarılmıştır. Tüm hayvanlarda 30. gün gebelik muayenesi ultrasonografi ile değerlendirilmiştir. Doğum döneminde elde edilen gebelik oranları ve ikizlik-üçüzlük dağılımları kaydedilmiştir. Elde edilen bulgular, progesteron uygulanan grupta üreme parametrelerinde sayısal bir artış olmasına rağmen, gebelik oranı ve kuzu verimliliği açısından iki grup arasında istatistiksel olarak anlamlı bir fark olmadığını göstermiştir (P>0.05). Bu durum, çiftleşme sonrası 8-16. günler arasında uygulanan progesteronun senkronize edilen keçilerde üreme performansını belirgin düzeyde iyileştirmediğini ortaya koymaktadır. Sonuç olarak, çiftleşme sonrası progesteron uygulamasının ekonomik olarak faydalı olabileceği ancak rutin bir uygulama olarak önerilebilmesi için daha fazla keçinin dahil edildiği çalışmalara ihtiyaç olduğu kanaatine varılmıştır.

Anahtar Kelimeler

• Gebelik oranı
• keçi
• kuzu sayısı
• progesteron

Effects of Progesterone Supplementation Administered Between Days 8 and 16 After Mating on Reproductive Performance in Goats

Öz

This study was conducted to determine the effects of progesterone administered to goats after mating on pregnancy rates and the number of lambs born. The goats included in the synchronization protocol were divided into two groups: a control group and a progesterone administration group. Following mating, progesterone-impregnated intravaginal sponges were administered to the animals in the study group on day 8 after mating to support early pregnancy, and these sponges were removed on day 16. All animals underwent a 30-day pregnancy examination evaluated by ultrasonography. Pregnancy rates and twin-triplet distributions obtained during the birth period were recorded. The findings indicate that, despite a numerical increase in reproductive parameters in the group administered progesterone, there was no statistically significant difference between the two groups in terms of pregnancy rate and lambing efficiency (P>0.05). This situation reveals that progesterone administered between days 8 and 16 after mating did not significantly improve reproductive performance in synchronized goats. In conclusion, it was concluded that post-mating progesterone administration may be economically beneficial, but more studies involving a larger number of goats are needed before it can be recommended as a routine practice.

Anahtar Kelimeler

• Goat
• lamb productivity
• pregnancy rate
• progesterone

Kaynakça

1. Oral HH, Yıldız F (2023). Changes and sustainability of small ruminant breeding in Muş province in the last 30 years. Turkish J Agri Food Sci Technol., 11.3: 532-545.
2. Tada O, Mamakoko MS, Mashamaite PK, Tshabuse P (2025). Evaluation of stress hormones on reproductive functions of sheep and goats: A systematic review. Frontiers in Animal Science., 6:1611896.
3. Fu K, Chen X, Guo W, Zhou Z, Zhang Y, Ji T et al. (2022). Effects of n acetylcysteine on the expression of genes associated with reproductive performance in the goat uterus during early gestation. Animals., 12(18):2431.
4. Nava-Trujillo H, Chango-Villasmil J, Finol-Parra G, Maldonado-Suárez J, Torres-Rodríguez P, Carrillo-Fernández F et al. (2008). Brief communication: effect of post-mating progestagen administration on pregnancy rate in crossbred goats following an induced estrus. Revista Científica., 18(5): 578-581.
5. Hoskins EC, Halloran KM, Stenhouse C, Moses RM, Dunlap KA, Satterfield M C et al. (2021). Pre-implantation exogenous progesterone and pregnancy in sheep: I. polyamines, nutrient transport, and progestamedins. Journal of Animal Science and Biotechnology., 12(1): 39.
6. Ealy AD, Yang QE (2009). Control of interferon‐tau expression during early pregnancy in ruminants. AJRI., 61(2):95-106.
7. Nakafeero A, Gonzalez-Bulnes A, Martinez-Ros P (2024). Use of Short-Term CIDR-Based Protocols for Oestrus Synchronisation in Goats at Tropical and Subtropical Latitudes. Animals., 14(11): 1560.
8. Karaca F, Doğruer G, Saribay MK, Ateş CT (2010). Oestrus synchronization with short-term and long-term progestagen treatments in goats: the use of GnRH prior to short-term progestagen treatment.. Ital J Anim Sci, 9(1): e22.

9. Akther S, Munsi MN, Rahman MH, Hassan MZ (2022). Pregnancy diagnosis in goats (Capra hircus) using barium chloride and progesterone-based kit in Bangladesh. Asian J. Med. Biol. Res., 8(1): 42-46.
10. Mann GE, Lamming GE (2001). Relationship between maternal endocrine environment, early embryo development and inhibition of the luteolytic mechanism in cows. Reproduction., 121(1):175-180.
11. İbiş M, Ağaoğlu AS (2022). Saanen keçilerinde çiftleşme sonrası progesteron ve gonadotropin uygulamaları ve gebelik oranlarının belirlenmesi. MAE Vet Fak Derg., 7 (1) : 1 - 6.
12. Mann GE, Fray MD, Lamming GE (2006). Effects of time of progesterone supplementation on embryo development and interferon-τ production in the cow.TVJ., 171(3): 500-503.
13. Diskin MG, Morris DG (2008). Embryonic and early foetal losses in cattle and other ruminants. Reprod Dom Anim., 43: 260-267.
14. Green JA, Geisert RD, Johnson GA, Spencer TE (2021). Implantation and placentation in ruminants. In Placentation in Mammals: Tribute to EC Amoroso’s Lifetime Contributions to Viviparity. Cham: Springer International Publishing., 129-154.
15. Tyree MF, Stenhouse C (2025). Exogenous progesterone supplementation: a strategy to enhance conceptus development in sheep and pigs? Reproduction & Fertility 6(1).
16. Husein MQ, Ababneh MM, Hijazi JF (2007). The effect of post-mating progesterone supplement on pregnancy and lambing rates of ewes bred out-of-season. American Journal of Animal and Veterinary Sciences., 2(3): 55-61.
17. Davies MCG, Beck NFG (1992). Plasma hormone profliles and fertility in ewe lambs given progestagen supplementation after mating. Theriogenology., 38(3): 513-526.