Developmental study of metanephrose in local bovine's foetuses during 1st and 2nd trimester of pregnancy

الملخص EN

The present work was designed to investigate the histological developmental characteristic of metanephros has been done in the local bovine's fetuses in different stages of pregnancy.

The study was performed on 24 bovine´s fetuses distributed at six groups ( 1, 2, 3, 4, 5, 6 ) months gestational age collected from the slaughtered pregnant cows in the slaughterhouses in Babylon province.

The present study showed that the metanephrose at 1st month appear bean – shape composed of primary excretory duct, primitive renal calyex and not yet at the nephron forming stage.

The histological study for different stages showed that differentiation and formation of the renal corpuscle, began in the bovine kidney before 2nd month of pregnancy and it is passed through sequential and complex morphological stages in embryonic life, while the jaxtaglomerular apparatus is absent and the Henle loops are undifferentiating relatively in 2nd month of gestation.

The purpose of our study to provide a more complete quantitive histolodevelopmental description of the metanephros formation in bovine fetuses.