Female reproductive organs and pelvic bones, 3D image based on computed tomography (CT) scan. The pelvic and hip bones are yellow in this semi-transparent view from above. At centre is the uterus, within which a foetus develops during pregnancy. Below it is the vagina, which also functions as the birth canal. Between the two is the cervix, the neck of the uterus. At left and right are the two ovaries, from one of which an egg (ovum) is released during the monthly ovulation cycle. This egg travels down the adjacent oviduct (Fallopian tube) to the uterus, where it either embeds in the uterine wall (if fertilised) or is lost with the uterine wall (endometrium) during menstruation.