Ruptured Uterine Artery.
This is the uterus from a cow that died after a cesarean section because the uterine artery had been stretched and torn. Rupture of the uterine artery may also occur at the time of a uterine prolapse. While the uterus is prolapsed the torn artery may be compressed. Upon replacement of the prolapsed mass the cow will bleed (out) into the broad ligament.