Kısraklarda Embriyo Mortilitesi

Büşra Özmen; İbrahim Doğan

doi:10.51755/turkvetj.1545934

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Kısraklarda Embriyo Mortilitesi

Öz

At yetiştiriciliğinde en temel hedeflerden biri her damızlık kısraktan yılda bir canlı tayın doğmasıdır. Her ne kadar basit bir hedef gibi görünse de, kısraklarda uzun gebelik süresi ve sınırlı üreme sezonu gibi fizyolojik koşullar bu hedefe ulaşmayı zorlaştırır. Reprodüksiyonun kontrolü ve monitörizasyonu için geliştirilen teknikler, kısraklarda üreme verimliliğini artırsa da embriyonik kayıplar günümüzde hala bir paradoks olarak varlığını sürdürmektedir. Kısraklarda embriyonik dönem, 40 günlük süreyi kapsar, bu dönemdeki ölüm oranı değişken popülasyon ve metedolojiye göre %5-24 arasında değişkenlik gösterir. Etiyolojik faktörler internal, eksternal ve embriyo kaynaklı olmak üzere üç ana başlık altında sınıflandırılmıştır. Embriyonik ölümlerin en güvenilir teşhis yöntemi transrektal ultrasonografidir ve tanı, daha önce görüntülenmiş konseptusun ardışık iki muayenede görüntülenememesi prensibine dayanır. Embriyonun düzensiz şekli ve boyutu, ovulasyondan 16 gün sonra vezikülün hareketliliği, endometriyumda aşırı ödem ve sıvı birikimi gibi ultrasonografik bulgular embriyonik kayıplara işaret edebilir. Embriyonik gelişimin monitorizasyonu, etiyolojisi kaotik olan embriyonik ölümlerin tanısında ve fetilitenin kontrolünde hekimlere operasyonel bir çözüm sunar.

Anahtar Kelimeler

Embryo Mortality in Mares

Abstract

One of the most basic goals in horse breeding is to have one live foal born per year from each breeding mare. Although it may seem like a simple goal, physiological conditions such as long gestation period and limited breeding season in mares make it difficult to achieve this goal. Although techniques developed for the control and monitoring of reproduction have increased reproductive efficiency in mares, embryonic losses still remain a paradox today. The embryonic period in mares covers a period of 40 days, and the mortality rate in this period varies between 5-24% depending on the variable population and methodology. Etiological factors are classified under three main headings: internal, external and embryonic. The most reliable diagnostic method of embryonic death is transrectal ultrasonography, and the diagnosis is based on the principle that the previously imaged conceptus cannot be visualized in two consecutive examinations. Ultrasonographic findings such as irregular shape and size of the embryo, motility of the vesicle 16 days after ovulation, excessive edema and fluid accumulation in the endometrium may indicate embryonic losses. Monitoring of embryonic development provides an operational solution to physicians in the diagnosis of embryonic deaths with chaotic etiology and in the control of fetility.

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Kaynakça

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