Follicular rupture is the process by which an oocyte is expelled from the ovary along with its surrounding oocytes, and is a normal ovulatory phenomenon that occurs when a follicle matures in a fertile woman. After the follicle develops to a mature follicle, the follicular fluid increases dramatically, the follicular cavity enlarges, and the follicle increases in size and protrudes toward the surface of the ovary. Under the influence of hormones such as follicle-stimulating hormone, the egg cell is discharged from the ovary along with its surrounding oocytes in a process known as follicular rupture, which is a normal ovulatory phenomenon in fertile women after the follicle has matured. After the follicle ruptures, the egg is transported through the fallopian tube to the uterus. Follicular rupture usually occurs about 14 days before the next menstrual period.