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Prevention of Unexplained Recurrent Abortion by Enoxaparine (PREFIX)

This study has been terminated.
(Stopped for futility)
Information provided by (Responsible Party):
University Hospital, Brest Identifier:
First received: August 22, 2008
Last updated: March 4, 2015
Last verified: March 2015
Standard investigations fail to reveal any apparent cause in 50% of the cases of recurrent spontaneous abortion. Prothrombotic mechanisms were initially evoked. Factor V Leiden, Prothrombin G20210A mutation and protein S deficiency are implicated in the meta-analysis of Rey (Lancet).However, they do not account for a large number of miscarriages.Gris JC and coworkers (Blood 2004)carried out an open trial, low-molecular-weight heparin versus low-dose aspirin, in women with one fetal loss and with a constitutional thrombophilic disorder. They conclude for a benefit action of Low-molecular-weight heparin. There is actually no trials concerning women with unexplained recurrent abortions and without known thrombophilia. Nevertheless,aspirin or enoxaparin are often prescribed. It is time to assess these practices. We therefore initiate a multisite, double blind randomized study, enoxaparine versus placebo, in women without known thrombophilia, which experienced unexplained recurrent abortions.

Condition Intervention Phase
Alive and Viable Births Drug: enoxaparine 40 mg daily Drug: placebo Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Essai thérapeutique randomisé Multicentrique en Double Insu, Comparant l'énoxaparine 40mg Versus Placebo, en Une Injection Sous-cutanée Quotidienne, Dans Les Fausses Couches spontanées récurrentes inexpliquées

Further study details as provided by University Hospital, Brest:

Primary Outcome Measures:
  • Alive and Viable Births [ Time Frame: number of born child healthy ]

Enrollment: 258
Study Start Date: April 2007
Study Completion Date: September 2014
Primary Completion Date: September 2013 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Placebo Comparator: 2 Drug: placebo
Women inject ourselves every days with placebo
Experimental: 1 Drug: enoxaparine 40 mg daily
Women inject ourselves every days with 40 mg of enoxaparine


Ages Eligible for Study:   18 Years to 45 Years   (Adult)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Women between 18 and 45 years
  • 2 or more consecutive spontaneous abortions before the 15th week of pregnancy
  • Unexplained abortions
  • No maternal or paternal characterized chromosomal aberration
  • No Anti-phospholipid Syndrome
  • No anatomical abnormality possibly responsible for abortion
  • No Factor V Leiden
  • No Prothrombin G20210A mutation
  • No protein S deficiency
  • No protein C deficiency
  • No Anti thrombin 3 deficiency
  • Proved pregnancy

Exclusion Criteria:

  • Contraindications of enoxaparine 4000 U per day
  • Women with risk of venous thromboembolism during pregnancy
  • No regular anticoagulation or antiplatelet treatment
  • Blood Hemoglobin level below 10g/dl
  • Blood platelet level below 150 000/mm3
  • Creatinine clearance below 30ml/mn
  • Anomaly of the coagulation tests
  • No informed consent
  Contacts and Locations
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Please refer to this study by its identifier: NCT00740545

Centre Hospitalier Universitaire de Brest
Brest, France, 29609
Centre Hospitalier Régional Universitaire de Caen
Caen, France, 14033
Centre Hospitalier Universitaire de Dijon
Dijon, France, 21079
Centre Hospitalier Bretagne Sud
Lorient, France
Centre Hospitalier Nord Marseille
Marseille, France, 13915
Centre Hospitalier Universitaire de Rouen
Rouen, France, 76031
Centre Hospitalier Universitaire de St Etienne
Saint Etienne, France
Sponsors and Collaborators
University Hospital, Brest
Principal Investigator: Elisabeth Pasquier, MD Internal Medecine and pneumology department of university hospital of Brest (FRANCE)
  More Information

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: University Hospital, Brest Identifier: NCT00740545     History of Changes
Other Study ID Numbers: RB06.050
Study First Received: August 22, 2008
Last Updated: March 4, 2015 processed this record on September 19, 2017