• Deep vein thrombosis
  • Reduced red blood cell count, as shown in a blood test
  • Stroke
  • Pulmonary embolism
  • Miscarriage, especially multiple miscarriages
  • Anemia
  • Leg ulcers
  • Heart murmur
  • Transient ischemic attack
  • Superficial thrombophlebitis, or swelling of small veins near the surface of the skin