Some anatomical and histological studies on the placenta of goats in Dhamar, Yemen

الملخص

The aim of study was to perform a comparative analysis of the morphological features of the placenta of Yemeni goat breeds. The study was carried out on twenty placentae of pregnant goats obtained from Dhamar slaughterhouses. The samples were collected from both uteri of different CVRL from 1 – 30 cm. Their fetal ages were estimated according to the CVRL. The results revealed that the type of placenta in goats is typical syndesmochorial. The chorionic villi were not branched. One type of epithelium was distinguished covering the villi, those cells were the syncytiotrophoblasts. Interdigitation was observed between the villi and the endometrial folds. The Hofbauer's cells were detected in the last stages of gestation. The number of placentomes was ranged from 40 – 60. It is concluded that that the Yemeni pregnant goats posses polycotyledonary placenta. The modification in the shape and size of placenta increases with gestational age in response to pregnancy progresses.