In embryonic stages, the reproductive organs of the male and female, i.e. the testicles and the ovaries, begin their development near the kidney between the spinal column and the eleventh and twelfth ribs.

Later they descend; the female gonads (ovaries) stop in the pelvis while the male gonads (testicles) continue their descent before birth to reach the scrotum through the inguinal canal. Even in adulthood after the descent of the reproductive organs, these organs receive their nerve supply an blood supply from the Abdominal Aorta, which is in the area between the backbone (spinal column) and the ribs. The lymphatic drainage and the venous return also go to the same area.