Female reproductive organs, endoscope view. One of the two ovaries (white) has been revealed by the tool (black, upper centre) that has lifted up part of the ovary's fallopian tube. The opening of the fallopian tube is at lower right. The rest of the tube runs next to the ovary, towards upper centre, and then across to the uterus (top left). Other abdominal organs are in the background. Ovaries contain maturing female reproductive cells (ova, eggs). An egg is released during ovulation, and it passes through its fallopian tube to reach the uterus. If the egg is fertilised and implants in the uterus wall, it can develop into a baby. Most ovaries are 2-4 centimetres long.