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The interrelationship between pregnancy, venous thromboembolism, and thyroid disease: a hypothesis-generating review
Stine Linding Andersen1,2, Kasper Krogh Nielsen3,4, Søren Risom Kristensen3,4
1Department of Clinical Biochemistry, Aalborg University Hospital, Hobrovej 18-22, 9000, Aalborg, Denmark. stine.a@rn.dk.
Abstract:
Pregnancy induces physiological changes that affect the risk of thrombosis and thyroid disease. In this hypothesis-generating review, the physiological changes in the coagulation system and in thyroid function during a normal pregnancy are described, and the incidence of venous thromboembolism (VTE) and thyroid disease in and after a pregnancy are compared and discussed. Furthermore, evidence regarding the association between thyroid disease and VTE in non-pregnant individuals is scrutinized. In conclusion, a normal pregnancy entails hormonal changes, which influence the onset of VTE and thyroid disease. Current evidence suggests an association between thyroid disease and VTE in non-pregnant individuals. This review proposes the hypothesis that maternal thyroid disease associates with VTE in pregnant women and call for future research studies on this subject. If an association exists in pregnant women specifically, such findings may have clinical implications regarding strategies for thyroid function testing and potential thromboprophylaxis in selected individuals.
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