This is an image of the uterus and uterine (fallopian) tubes. Dye is injected into the uterus through a catheter passed through the cervix, and its course is monitored with radiographs. Note the extravasation of the dye into the intraperitoneal space as it reaches the end of the uterine tubes. This represents the location of the ovaries, and highlights the communication between the uterine tubes and the intraperitoneal space.