Fetal warfarin syndrome

Last revised by Assoc Prof Frank Gaillard on 18 Aug 2019

Fetal warfarin syndrome (FWS) is a rare condition which can occur as a result of fetal exposure to maternal ingestion of warfarin during pregnancy.

Reported clinical features include:

Warfarin is a teratogenic drug. The increased risk of birth defects occurs particularly with warfarin use during ~6-9 weeks gestation.

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