Uterine embolization generally takes one to two hours. It is generally performed under a local anesthesia, which numbs the groin area, usually combined with intravenous sedation. Although in some cases a general anesthesia may be used. During the procedure the Interventional Radiologist makes a 3-4 mm. cut in the skin at the groin. A catheter is inserted into the femoral artery. Radiographic contrast material is injected to allow mapping of the blood vessels as the catheter is threaded through the uterine arteries. Tiny particles are injected into the uterine arteries blocking blood flow to the fibroid tumors. Once completed the skin puncture is cleaned and bandaged.