Koyunlarda Plasentom Boyutuna Fötal Cinsiyetin Etkisinin Belirlenmesi

Öz

Bu çalışma fötal gelişimde önemli rolü olan plasentomların, orta ve ileri gebelik sürecindeki boyutuna fötal cinsiyetin etkisini ortaya çıkarmak amacıyla yürütülmüştür. Çalışmanın hayvan materyalini tekiz gebe olan 11 adet İvesi ırkı koyun oluşturdu. Gebe koyunlar taşıdıkları fetüsün cinsiyetine göre; erkek fetüs taşıyanlar (Grup E, n:7) ve dişi fetüs taşıyanlar olarak (Grup D, n:4) olarak iki gruba ayrıldı. Gebeliğin 85-145. günleri arasında her 10 günde bir gerçekleştirilen abdominal ultrasonografi ile plasentom ortalama çap ve kalınlıkları belirlendi. Ultrasonografik muayene günlerinde ayrıca kan numuneleri alınarak serum progesteron düzeyi ölçüldü. Analizler sonucunda orta ve ileri dönemde olan tekiz gebe koyunlarda fötal cinsiyetin ultrasonografik olarak ölçülen plasentom ortalama çap ve kalınlığına, ayrıca serum progesteron düzeyine etkisi olmadığı görüldü (P>0.05). Ancak sözü geçen parametrelerin muayene günleri boyunca değişimi her iki grupta da istatistik olarak anlamlıydı (P<0.001). Sağlıklı ilerleyen gebelik sürecinde tekiz gebe koyunlarda fötal cinsiyetin plasentom boyutuna etkisinin olmadığı sonucuna varıldı. Gebelik sürecinde plasentom kalınlığının rolünün gelecekte yapılacak çalışmalarda aydınlatılmayı bekleyen bir konu olduğu düşünüldü.

Anahtar Kelimeler

• plasentom çapı
• plasentom kalınlığı
• orta gebelik
• ileri gebelik
• koyun

Determination of the Effect of Fetal Sex on Placentome Size in Sheep

Abstract

This study was carried out to reveal the effect of fetal gender on the size of placentomes, which have an essential role in fetal development, during mid and late pregnancy. The animal material of the study consisted of 11 pregnant Awassi sheep bearing a single fetus. Pregnant sheep were divided into two groups according to the sex of the fetus as those bearing male fetuses (Group E, n: 7) and those bearing female fetuses (Group D, n: 4). The mean diameter and thickness of the placentomes were determined by abdominal ultrasonography performed every ten days between 85-145 days pregnancy. On the days of ultra-sonographic examination, blood samples were also taken, and serum progesterone level was measured. As a result of the analyzes, it was observed that fetal sex did not effect on the mean diameter and thickness of the placentomes measured by ultrasonography, and also on the serum progesterone concentration in singleton pregnant ewes in the middle and late pregnancy (P>0.05). However, the change in the mentioned parameters during the examination days was statistically significant in both groups (P<0.001). It was concluded that fetal sex did not effect on placentome size in singleton pregnant ewes during a healthy progressing pregnancy. It was thought that the role of placentome thickness during pregnancy is a subject waiting to be clarified in future studies.

Keywords

• ewe
• late pregnancy
• middle pregnancy
• placentome diameter
• placentome thickness

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