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The uterosacral ligaments (or rectouterine ligaments) are major ligaments of uterus that extend posterior-ward from the cervix to attach onto the (anterior aspect of the) sacrum.
Structure
Microanatomy/histology
The uterosacral ligaments consist of fibrous connective tissue, and smooth muscle tissue.
Drake, Richard L.; Vogl, Wayne; Tibbitts, Adam W.M. Mitchell; illustrations by Richard; Richardson, Paul (2005). Gray's anatomy for students. Philadelphia: Elsevier/Churchill Livingstone. p. 417. ISBN978-0-8089-2306-0.