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Pregnant women have a higher risk of deep vein thrombosis and pulmonary embolism.footnote 1
The three main risk factors (things that increase risk) for developing deep vein thrombosis and pulmonary embolism are abnormal clotting, reduced blood flow, and damage to the veins. These risks are all higher during pregnancy, most likely because of:
Women who are obese, are older than 35, or have a family or personal history of blood clots have a higher risk of developing a clot that can lead to pulmonary embolism.
After delivery, the risk for blood clots is higher than during pregnancy. This risk usually returns to normal after a few weeks after delivery.footnote 2
If a woman has a cesarean section, she is even more likely to develop one or more of these clots.
Women with the following history may be screened for genetic factors that can increase the risk of forming blood clots:
For pregnant women who are more likely to develop blood clots, several methods may be used to prevent deep vein thrombosis and pulmonary embolism. These include:
A pregnant woman who is diagnosed with deep vein thrombosis or pulmonary embolism will work with her doctor to decide which anticoagulant medicine to take during pregnancy. She may take heparin, because it has not been shown to affect the fetus.
After delivery, the woman might take another anticoagulant for a few weeks or a few months.
CitationsAmerican College of Obstetricians and Gynecologists (2011). Thromboembolism in pregnancy. ACOG Practice Bulletin No. 123. Obstetrics and Gynecology, 118(3): 718-729.Tapson VF, Becker RC (2007). Venous thromboembolism. In EJ Topol, ed., Textbook of Cardiovascular Medicine, 3rd ed., pp. 1569-1584. Philadelphia: Lippincott Williams and Wilkins.
ByHealthwise StaffPrimary Medical ReviewerE. Gregory Thompson, MD - Internal MedicineAdam Husney, MD - Family MedicineSpecialist Medical ReviewerJeffrey S. Ginsberg, MD - Hematology
Current as ofMarch 20, 2017
Current as of: March 20, 2017
Author: Healthwise Staff
Medical Review: E. Gregory Thompson, MD - Internal Medicine & Adam Husney, MD - Family Medicine & Jeffrey S. Ginsberg, MD - Hematology
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