A medical clamp for holding a uterus includes a first and second curved plates that capture between them the major exterior walls of the uterus, and an operating handle having pivotally connected first and second actuating arms, each of which has a distal portion and a proximal portion with a grip for a user, whereby the distal portions are moved toward each other when the user moves the grips toward each other to capture the uterus between the plates. Ball-and-socket joints connect the distal handle portions of the actuating arms to respective plates. The ball-and socket joints enable rapid positioning of the clamp on the uterus to arrest emergency postpartum hemorrhaging, assist in exerting pressure on the uterus over the entire extent of the plates, facilitate manipulation of the uterus using the clamp, and permit other surgical interventions to be performed with the clamp in place.