Factor V Leiden can be associated with a variety of serious and potentially serious clotting complications, including:

• Pregnancy complications. Most women with factor V Leiden have normal pregnancies. But the mutation has been linked with an increased risk of miscarriage and possibly other complications during pregnancy, including pregnancy-induced high blood pressure (preeclampsia), slow fetal growth and early separation of the placenta from the uterine wall (placental abruption). If you're a pregnant woman with factor V Leiden, be sure your doctor monitors you carefully throughout your pregnancy.
• Deep vein thrombosis (DVT). People with factor V Leiden have an increased risk of developing deep vein thrombosis compared with someone without the mutation, though the overall risk of developing deep vein thrombosis is still low.
• Pulmonary embolism. Deep vein thrombosis puts you at risk of a clot breaking off and traveling to your lungs or, rarely, your brain. A pulmonary embolism can be fatal. It's important to watch for signs and symptoms of a pulmonary embolism, such as shortness of breath or chest pain, and to seek prompt medical attention.

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July 14, 2015