Most follicles 21x14mm not round are also normal. This is because many normal follicles may also be oval. Whether a follicle is normal also needs to be assessed in relation to whether it is full in shape and whether it is ovulating. If the follicle is 21x14mm, but the ultrasound shows that the follicle is full and the fluid inside the sac is clear, then the follicle will be able to ovulate normally and form a fertilized egg with the sperm. This situation is normal even if the follicle is not round. This is because the diameter of the follicle is assessed by ultrasound and may also appear as an oval follicle when the adnexal area is pressed during measurement. If the follicle is not round at 21x14mm, the ultrasound suggests that the follicle has poor tone, is not morphologically full, and the fluid in the follicular capsule is relatively cloudy and is not able to drain from the ovary, resulting in an abnormal ovulatory function and the formation of unruptured follicles that are luteinized. This is abnormal even if the follicle reaches the size of a dominant follicle. Follicle monitoring is an important part of the follicle monitoring process, and it is recommended that you have your follicles evaluated by a medical professional. During follicle monitoring, it is important to eat well, have a regular diet, and avoid exertion, as good lifestyle habits will help to improve follicle quality.