The gall bladder had a pear shape during the prenatal and postnatal stages. It consisted of a fundus, body and neck conected with the cystic duct.
At the early foetal ages the lamina epithelialis was formed of pseudos tratified columnar epithelium which changed into a simple columnar in foeti of 4cm CVRL. Between the tall columnar cells there were narrow cells with elongated, rodshaped, darkly stained nuclei and darkly acidophilic cytoplasm. Intraepithelial lymphocytic infiltrations were observed at the prenatal and postnatal stages. The goblet cells were firstly observed in the neck region of the bladder in foeti of 12-16cm CVRL, then appeard at its body region in foeti of 20cm CVRL and at its fundus in foeti of 40cm CVRL.
Glandular primordia were firstly seen in foeti of 50cm CVRL and were differentiated into tubulo-alveolar branched glands at foetal stage of 65cm CVRL. The muscular layer at the neck region of the gall bladder was thinner in the prenatal stages and thicker in the postnatal stages than that of the body and the fundus regions.