Changes

* Primary ovarian cells line hollow cavities with folded walls.

* Primary ovarian cells line hollow cavities with folded walls.

** Oogonia are shed into this cavity, gaining a layer of epithelial cells in the process.

** Oogonia are shed into this cavity, gaining a layer of epithelial cells in the process.

** Become [[The_Ovary_-_Follicles_- Anatomy & Physiology|granulosa cells]], responsible for yolk formation in the developing egg.

** Become [[Follicles - Anatomy & Physiology|granulosa cells]], responsible for yolk formation in the developing egg.

* Ovarian [[The_Ovary_-_Follicles_- Anatomy & Physiology|follicle]] grows.

* Ovarian [[Follicles - Anatomy & Physiology|follicle]] grows.

** Hyaline zone forms between the oocyte and the epithelial cells - the zona pellucida.

** Hyaline zone forms between the oocyte and the epithelial cells - the zona pellucida.

==== Post-Oocyte release ====

==== Post-Oocyte release ====

* Postovulatory [[The_Ovary_-_Follicles_- Anatomy & Physiology|follicles]] are formed after [[Oogenesis - Anatomy & Physiology|oocyte]] release

* Postovulatory [[Follicles - Anatomy & Physiology|follicles]] are formed after [[Oogenesis - Anatomy & Physiology|oocyte]] release

** Do not have endocrine function

** Do not have endocrine function

** Wide irregular lumen

** Wide irregular lumen

** Rapidly reabosrbed in a process involving the apoptosis of [[The_Ovary_-_Follicles_- Anatomy & Physiology|follicular cells]].

** Rapidly reabosrbed in a process involving the apoptosis of [[Follicles - Anatomy & Physiology|follicular cells]].

* A degenerative process called follicular atresia reabsorbs vitellogenic [[Oogenesis - Anatomy & Physiology|oocytes]] not spawned.

* A degenerative process called follicular atresia reabsorbs vitellogenic [[Oogenesis - Anatomy & Physiology|oocytes]] not spawned.

**  This process can also occur, but less frequently, in [[Oogenesis - Anatomy & Physiology|oocytes]] in other development stages.

**  This process can also occur, but less frequently, in [[Oogenesis - Anatomy & Physiology|oocytes]] in other development stages.