What is an atretic follicle?

An atretic follicle is a degenerated ovarian follicle that has failed to mature and become a viable egg. During the menstrual cycle, many follicles begin to develop, but typically only one reaches full maturity; the rest undergo atresia, a process where they break down and are reabsorbed by the body. Atretic follicles are characterized by changes in their structure, including the collapse of the follicular wall and loss of oocyte viability. This process is a normal part of follicular development and ovarian function.