Kısraklarda Erken Gebelik Tespiti

Öz

At yetiştiriciliğinde kısa olan üreme sezonunun iyi değerlendirilip, sezon boşa geçirilmeden kısraklarda gebeliğin oluşturulması öncelikli hedefler arasında yer almaktadır. Sınırlı üreme sezonuna sahip kısrakların ülkemizin de içinde bulunduğu coğrafyada ilkbahar aylarında başlayan ovaryum aktiviteleri sonbahara kadar devam etmektedir. Bu süreç içinde reprodüktif herhangi bir sorunu olmayan kısraklarda düzenli östrus siklusu sayısıda oldukça azdır. Dolayısıyla gebeliğin mümkün olan en kısa zamanda tespitinin kritik önemi bulunmaktadır. Bu amaçla farklı tanı yöntemleri kullanılmasına rağmen, gebeliğin mümkün olan en kısa zamanda teşhisine olanak sağlayacak etkin ve pratik bir yönteme halen ihtiyaç duyulmaktadır. Bu derleme kapsamında öncelikle kısrakların erken gebelik fizyolojisi hakkında kısaca bilgi verilecektir. Mevcut gebelik tanı yöntemleri (östrusların izlenmesi, rektal palpasyon, ultrasonografi, progesteron, östrojen, eCG, erken gebelik faktörünün ölçümü ve gebeliğe bağlı gen ekspresyonları ile gebelik tespiti) avantajları ve dezavantajları açısından tartışılacaktır. Ayrıca, gebeliğin maternal kabul mekanizmasının moleküler düzeyde anlaşılması amacıyla yapılan güncel çalışmalar ve gebeliğin tanısında alternatif yaklaşımlar hakkında bilgi verilecektir.

Anahtar Kelimeler

• Erken gebelik tespiti, Kısrak

Kaynakça

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