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Risk of thrombosis is raised for 12 weeks after giving birth, finds US study

The risk of thrombosis after giving birth is significantly raised for at least 12 weeks after delivery, although the risk is highest in the first six weeks, a US study has found.

Researchers from Columbia University and Weill Cornell Medical College in New York looked at how long the risk of thrombotic events remained raised, after isolated case reports suggested that this may be longer than the traditional postpartum period of six weeks.

The researchers said that current guidelines from the American College of Chest Physicians on the prevention of thrombosis during the postpartum period—which recommend …