Anterior uterine wall with B-Lynch suture in place and an enlarged drawing (box) of lower uterine segment with B-Lynch suture in place

A large Mayo needle with #2 chromic catgut is used to enter and exit the uterine cavity at A and B. The suture is looped over the fundus and then reenters the uterine cavity posteriorly at C, which is directly below B. The suture should be pulled very tight at this point. It then enters the posterior wall of the uterine cavity at D, is looped back over the fundus, and anchored by entering the anterior lateral lower uterine segment at E and crossing through the uterine cavity to exit at F. The free ends at A and F are tied down securely to compress the uterus. The procedure was originally described by Christopher B-Lynch.^[1]