How important are the follicular cysts?
The follicle contains the egg which is normally released from this sac when it is mature enough. After the sac had ruptured and set free the egg, it will normally disintegrate. But when this sac does not rupture it will continue to grow and if it ends up measuring more than 8 cm then surgery is necessary. In most of the cases they do not get so large because they shrink after ovulation.