Related Experiment Video
Updated: Aug 19, 2026

Separation of Avian Preovulatory Follicle Granulosa and Theca Cell Layers for Downstream Applications
Published on: October 25, 2024
Ultrastructural observations of previtellogenic ovarian follicles of dove
1Bucharest University, Faculty of Biology, Department of Animal Biology, Splaiul Independentei 91-95, Bucharest 5, Romania. otilia@dbio.ro
Abstract:
Dove ovarian follicle is a complex structure composed of oocyte surrounded by a somatic compartment consisting of theca externa, theca interna and granulosa. The structure of ovarian follicle (1 and 2 mm) of dove was studied by electron microscopy. The granulosa was pseudostratified in the 1-mm-diameter follicles and stratified with two or three irregular rows of cells in the 2-mm-diameter follicles. In the larger follicle indentations between oocyte and granulosa cells become more numerous and the microvilli of granulosa cell elongated to form a zona radiata with similarly elongated oocyte microvilli. Lining bodies were present at the tips of granulosa microvilli and in the cortical region of the oocyte. In the oocyte cortex were observed coated pits, coated vesicles, dense tubules, multivesicular bodies and primordial yolk spheres. Primordial yolk spheres may contain lining bodies and were observed fused with dense tubules and multivesicular bodies or associated with smooth cisternae.
Related Concept Videos
Folliculogenesis
Ovaries
On the ovarian surface, a layer of cuboidal...
Oogenesis
Oogenesis
Each primary oocyte is surrounded by a layer of pre-granulosa cells, forming what is known...
Ovarian Cycle
