Final answer:
After puberty, a few primordial follicles develop into primary follicles each day over the course of approximately two months in humans.
Step-by-step explanation:
After puberty, a few primordial follicles develop into primary follicles each day. The primary follicles start with a single layer of granulosa cells, which then become active and transition into a rounded, cuboidal shape as they increase in size and proliferate. The follicles, now called secondary follicles, continue to increase in diameter and add a new outer layer of connective tissue, blood vessels, and theca cells. This process occurs over the course of approximately two months in humans.