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What are the guidelines for anticoagulation in patients with inherited thrombophilia during pregnancy?

Answer

Guideline-Aligned (High Confidence)
Generated by iatroX. Developer: Dr Kola Tytler MBBS CertHE MBA MRCGP (General Practitioner).
Last reviewed: 16 August 2025

Anticoagulation management in pregnant patients with inherited thrombophilia involves specialist assessment and tailored thromboprophylaxis. Women with inherited thrombophilia and a history of venous thromboembolism (VTE) should receive pre-pregnancy counselling and a management plan developed in collaboration with a haematologist experienced in thrombosis in pregnancy 1.

Low molecular weight heparin (LMWH) is the preferred anticoagulant during pregnancy, started as soon as possible when indicated, and continued until the woman is no longer at increased risk of VTE or until discharge from hospital or midwife-led unit 2.

Warfarin is contraindicated in pregnancy due to teratogenicity and should be stopped before conception, with a switch to LMWH or heparin advised 1.

For women with recurrent VTE or high-risk thrombophilia, specialist advice is required regarding LMWH dosing, which may need to be higher than standard prophylactic doses 1.

During labour and delivery, anticoagulation should be managed carefully to balance bleeding and thrombosis risks, often involving multidisciplinary teams including obstetricians and haematologists 4.

Postpartum thromboprophylaxis with LMWH is recommended, typically for a minimum of 7 days, especially in women with ongoing risk factors 2.

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