The follicle is a functional anatomical structure which forms part of the ovary and the egg is the cell that will mature in a microscopic part of inner wall of a follicle over spontaneous or stimulated ovarian cycle in normal conditions. The follicles that do not release a mature egg disintegrate and this can happen at any stage of follicular development. Every follicle will not necessarily contain a quality egg. So, don't be surprised if the number of eggs retrieved is less than the number of healthy size follicles you were told you had. Read the following article to know more about the role of follicles in your fertility.