Latin Antrum folliculare FMA 18675 | Dorlands/Elsevier a_50/12143527 | |
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.
References
Follicular antrum Wikipedia(Text) CC BY-SA