author(s)
Tanvi Mahajan, Kamal Sarma and Jonali Devi

abstract
The present study was conducted on the kidneys of 18 goat foetii which were divided into three groups based on their estimated ages containing 6 foetii in each group. At 45 days of gestation (Crown Rump Length, CRL=5.3 cm), the differentiating mesenchymal cells near the capsule were observed having a cord like arrangement. At 50 days of gestation (CRL=7.6 cm), the formation of the nephrogenic vesicles and their elongation into S-shaped structures increased in all the three zones of the cortex i.e. subcapsular, intermediate and juxta medullary zones. At 59 days (CRL=8.10 cm) of gestation, the renal corpuscles of the juxta medullary region of the kidney resembled those of the mature kidney in shape and structure. At 62 days (CRL=10.10 cm) of foetal age, true juxta glomerular cells were noticed. Majority of the histochemicals exhibited increased reactions in the kidney with advancing gestational age of the goat foetii. It could be concluded that the microscopic structures of the goat kidney showed development with the advancement of foetal age.