What happens to the egg follicle in the ovary as fsh rises?

As follicle-stimulating hormone (FSH) levels rise, it stimulates the growth and maturation of ovarian follicles in the ovary. The developing follicles respond to FSH by producing estrogen and supporting the growth of the oocyte within. As the follicles mature, one dominant follicle typically emerges, while others undergo atresia, ultimately leading to ovulation. This hormonal interplay is crucial for regulating the menstrual cycle and preparing for potential fertilization.