Final answer:
Follicular epithelial cells produce estrogen, which inhibits the continuation of meiosis in primary oocytes. This process is crucial for the maturation and release of the secondary oocytes during ovulation.
Step-by-step explanation:
Follicular epithelial cells, also known as granulosa cells, produce estrogen which prevents primary oocytes from continuation of meiosis. During the ovarian cycle, these granulosa cells work in conjunction with theca cells to produce estrogens, which are necessary for the growth and maintenance of the secondary follicle. It is only after a secondary oocyte is released during ovulation and potentially fertilized by a sperm, that meiosis is completed, ultimately leading to the formation of a mature ovum.