Secondary follicles have a structure similar to the primary follicle except for the appearance of fluid filled spaces among the follicular cells. As the follicle develops further, the spaces will coalesce into a single antrum.
Labels in this Slide:
- Secondary Follicle
- Primary Oocyte
- Zona Pellucida
- Follicular Fluid
- Theca
- Theca Interna
- Theca externa
- Large Secondary Follicle
- Cumulus Oophorus
- Antrum
Wiley, M. Ovary, Secondary follicle. Digital Laboratory Medicine Library, Dept of Laboratory Medicine & Pathobiology, University of Toronto. Published
. Accessed December 17, 2025. https://dev.dlml.cflabs.ca/image/ovary-secondary-follicle-lmp14653-01
