Female reproductive system, artwork. At upper centre is the uterus (womb), a hollow muscular organ. Either side of the uterus are the fallopian tubes (oviducts), which terminate at the ovaries. Every month one of the ovaries releases an egg (ovulation), which is received by the adjacent fallopian tube. The egg travels along the tube to the uterus, where, if fertilised, it will implant and grow. At bottom is the vagina, the muscular birth canal.