| Follicular antrum | |
|---|---|
| Details | |
| Identifiers | |
| Latin | antrum folliculare |
| FMA | 18675 |
| Anatomical terminology | |
The follicular antrum is the portion of an ovarian follicle filled with follicular fluid. Appearance of the follicular antrum during follicular maturation is the first sign that a follicle has reached the next stage of maturation. It has changed from a primary follicle to a secondary follicle.