NCT01019655.

Study name	NCT01019655: Heparin for pregnant women with thrombophilia.
Methods	Randomised controlled trial (open‐label).
Participants	Pregnant women with thrombophilia. Estimated enrolment: 300 women.
Interventions	Intervention: nadroparin calcium 0.3 mL daily during pregnancy and 6 weeks postpartum. Control: no intervention other than usual care at the study site.
Outcomes	Primary outcome: composite endpoint: pregnancy‐associated VTE; miscarriage; pre‐eclampsia; intrauterine growth restriction.
Starting date	January 2010.
Contact information	Dr Clemens B Tempfer, University of Vienna, Austria.
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