Withclose cooperation between the obstetric and hemophilia teams (ideally within adedicated hemophilia treatment center) during pregnancy, carriers’ factor VIII(FVIII)/factor IX (FIX) levels should be regularly assayed to help determine therisk of bleeding during delivery and postpartum.4 Although FVIII levels in carriers increase during pregnancy,15 achieving only low ‘normal range’ FVIII levels in the third trimester isarguably not ‘normal’ for the final stages of pregnancy. The gene discussed is F9; the disease is hemophilia.