During which phase of the menstrual cycle does the development of follicles occur?

The development of follicles occurs during the follicular phase of the menstrual cycle. This phase begins on the first day of menstruation and continues until ovulation. During this time, several follicles in the ovaries begin to mature under the influence of follicle-stimulating hormone (FSH) released from the pituitary gland.

As the follicles develop, one becomes dominant and continues to mature while the others undergo atresia (shrinkage and degeneration). This dominant follicle prepares for ovulation, which is the next phase of the cycle. The follicular phase is crucial for preparing the body for a potential pregnancy, as it leads to the release of estrogen from the growing follicles, which in turn stimulates the thickening of the uterine lining.

Understanding the importance of the follicular phase helps clarify the process of ovarian function and overall reproductive health.