Follicles that fail to be expelled after maturity may have insufficient hormone levels in the body, thick follicle walls, endometriosis in the ovaries, etc. Follicles not being able to be discharged properly can lead to infertility. When the hormone level in the body is insufficient, e.g., the ovarian function reserve decreases, it will lead to the follicle not being able to rupture and not being able to discharge the egg. The follicle wall is thicker so that the pressure inside the follicle also fails to force the follicle to rupture, thus failing to expel the egg, and the follicle forms a luteinization. Endometriosis foci in the ovaries, will cause the ovaries to cycle bleeding, so that the sebum adhesion of the ovaries, affecting the egg can not be discharged. Specifically, you need to go to the obstetrics and gynecology department of the hospital, do ultrasound and other tests to find out the cause, so as not to affect the infertility.