On a microscopic slide of the ovarian cortex, we are likely to see follicles in different stages of development (primordial follicles, primary follicles, secondary follicles, and mature follicles).

Ovarian Cortex

The outer layer of the ovary that contains the developing eggs (oocytes).

Primordial Follicles

The earliest stage of development of ovarian follicles, consisting of an immature egg cell surrounded by a single layer of granulosa cells.

Mature Follicles

Follicles in the ovary that are fully developed and capable of releasing an egg during ovulation.