Severity of complications associated with thrombophilia vary depending upon location and size of the clot. Clots in the extremities can cause superficial thrombophlebitis or deep vein thrombosis (DVT), both painful conditions. Clots in other areas of the body, such as the veins of major organs like the brain, liver and lungs, can be acutely life-threatening, and arterial clots can cause stroke and heart attack. Persons with thrombophilia wishing to have children should be aware of possible complications including stillbirth, preeclampsia, eclampsia.