Whether a follicle is empty or not can be determined by doing an abdominal ultrasound or a negative ultrasound. An empty follicle means that the ultrasound can observe the development of the follicle, the presence of the follicle, but there is no egg inside the follicle. Follicular development is detected by doing an abdominal ultrasound or a pubic ultrasound. The presence of dominant follicles and the ability of the follicles to develop and mature and thus ovulate naturally means that the follicles are normal and there are usually no empty follicles. However, if the screening test shows that a woman has ovulation problems, she will need to undergo treatment (ovulation induction program), otherwise the natural pregnancy will be affected. If empty follicles remain after treatment, this may be related to genetic factors, personal constitution, etc. The patient will need to follow the doctor’s instructions and have the relevant tests done. It is necessary to follow the doctor’s instructions to do the relevant tests and pay attention to the frequency of sexual intercourse.