To investigate the effect of anticoagulant treatment on pregnancy outcomes in patients with previous recurrent miscarriages (RM) who carry a methylenetetrahydrofolate reductase (MTHFR) gene mutation.

In this longitudinal retrospective study, patients with RM were treated during pregnancy with either: (i) 100 mg/day aspirin and 5 mg/day folic acid (group 1); or the same protocol plus 0.4 mg/day enoxaparin (group 2). An age-matched group of triparous women without RM or thrombophilia was used as the control group (group 3).

Recurrent miscarriage (RM) is defined as three or more consecutive spontaneous fetal losses and it affects 0.3% to 1% of pregnancies.To investigate the effect of anticoagulant treatment on pregnancy outcomes in patients with previous recurrent miscarriages (RM) who carry a methylenetetrahydrofolate reductase (MTHFR) gene mutation.

In this longitudinal retrospective study, patients with RM were treated during pregnancy with either: (i) 100 mg/day aspirin and 5 mg/day folic acid (group 1); or the same protocol plus 0.4 mg/day enoxaparin (group 2). An age-matched group of triparous women without RM or thrombophilia was used as the control group (group 3).

Inclusion Criteria:

• patients with three or more consecutive first-trimester miscarriage
• Three or more consecutive first-trimester miscatrriages
• C677T MTHFR gene mutation

Exclusion Criteria:

• Patients with the A1298C polymorphism

patients with three or more consecutive first-trimester miscarriages who were carrying the C677T MTHFR gene mutation and were treated and followed-up by the Department of Obstetrics, Gynaecology and Reproductive Medicine, Amiens University Medical Centre, Amiens, France between January 2006 and December 2011.