Pre-natal development of the choroid plexus in rabbit

Development of the choroid plexus of the lateral ventricle in rabbit was studied by histological paraffin sections. The choroid plexus is first observed as an invagination from the medial wall of the ventricle at the ninth day of gestation. From the age of 10 days to the age of 13 days prenatally the choroid epithelium is pseudostratified columnar. By the age of 14 days the choroid epithelium starts to present changes from pseudostratified columnar to simple columnar cells. Dark and light can be detected and a large number of metachromatically stained cytoplasmic inclusions at the basal pole can be detected from the age of 16 days prenatally