What is the difference between secondary follicles and tertiary follicles?

Secondary follicles:

The main follicle develops into a secondary follicle as it is surrounded by multiple layers of granulosa cells and a theca layer develops outside the basal lamina.

Tertiary follicles:

The creation of an antrum, a fluid-filled chamber, distinguishes the tertiary follicle.

Difference between secondary follicles and tertiary follicles:

Secondary follicles	Tertiary follicles
1. The secondary follicle grows from the primary follicle and has numerous layers of granulosa cells.	1. The secondary follicle gives rise to the tertiary follicle, which has many layers of granulosa cells and an antrum.
2. Secondary follicles lack a fluid-filled chamber known as the antrum.	2. Tertiary follicles have a fluid-filled chamber known as the antrum.
3. A preantral follicle is a secondary follicle.	3. The tertiary follicle is an antral follicle
4. Primary follicles are smaller than secondary follicles.	4. Secondary follicles are smaller than tertiary follicles.
5. Granulosa and theca cells have a greater mitotic rate.	5. In tertiary follicles, the mitotic rate of granulosa and theca cells begins to fall.