In which structure does fertilization usually occur?

Fertilization usually occurs in the Fallopian tube, specifically at the end part which is away from the uterus but close to the ovary. Before this happens, ovarian follicle releases egg cell which is picked up by Fallopian tube. As it moves through the tube, it also maturing and waiting for any sperm. If no sperm arrives, it will continue to mature until menstruation initiates.