Pressure on the iliac veins in the uterus can be caused by either pregnancy or a uterine mass, as both conditions can obstruct normal blood flow and lead to circulatory system changes.
Both pregnancy and a mass in the uterus can cause pressure on the iliac veins.
During pregnancy, the growing fetus can exert direct pressure on the blood vessels in the pelvic region, including the iliac veins. This pressure can lead to circulatory issues and an increased risk of conditions such as varicose veins or hemorrhoids. A mass in the uterus, such as a fibroid or a tumor, can similarly exert pressure on the iliac veins, impeding normal blood flow. These conditions both have the potential to obstruct venous return from the legs and pelvic area, which can lead to venous insufficiency, varicose veins, and even deep vein thrombosis (DVT) if not managed properly.
Thus, the correct answer is 3) Both pregnancy and a mass in the uterus can contribute to pressure on the iliac veins, affecting venous circulation in the pelvic area.