[2] The superior hypogastric plexus receives contributions from the two lower lumbar splanchnic nerves (L3-L4), which are branches of the chain ganglia.

[2] From the plexus, sympathetic fibers are carried into the pelvis as two main trunks - the right and left hypogastric nerves - each lying medial to the internal iliac artery and its branches.

It is anterior to the lumbar vertebra L5 and sacral promontory, the aortic bifurcation, and left common iliac vein.

[3] Presacral neurectomy is a laparoscopic procedure where superior hypogastric plexus is excised, so that the pain pathway is cut off from the spinal column.

[1] This article incorporates text in the public domain from page 987 of the 20th edition of Gray's Anatomy (1918)