Uterine inversion begins when the fundus collapses inward instead of staying rounded and firm. As the fundus descends, the uterus turns inside out. The degree of inversion can vary. In an incomplete inversion, the fundus has inverted but has not passed through the cervix. In a complete inversion, the fundus passes through the cervix. In a prolapsed inversion, the inverted uterus protrudes into or beyond the vagina. The danger comes from two simultaneous problems: hemorrhage and shock. Hemorrhage occurs because the uterus cannot contract effectively around the placental site when it is inverted. Shock may develop rapidly from blood loss, but uterine inversion can also trigger a strong vagal response, leading to hypotension, bradycardia, pallor, syncope, and cardiovascular collapse. This is why the client may appear profoundly unstable even when visible blood loss seems lower than expected. The longer the uterus remains inverted, the harder it becomes to replace. The cervix can constrict around the inverted uterus, and edema can develop. Prompt replacement is therefore time-sensitive. Merck states that treatment is immediate manual reduction, with fluids or blood products as...