Low Molecular Weight Heparin and/or Aspirin in Prevention of Habitual Abortion (HABENOX)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00959621
Recruitment Status : Completed
First Posted : August 14, 2009
Last Update Posted : August 14, 2009
Oulu University Hospital
Karolinska University Hospital
Leiden Hospital, Leiden, The Netherlands
Information provided by:
Helsinki University

Brief Summary:

1 % of all pregnancies end in habitual/recurrent abortion. In about half of women with habitual abortions (HAB) hereditary or acquired (antiphospholipid antibodies) thrombophilia are observed. The investigators wanted to test whether antithrombotic treatment (Low-Molecular Weight Heparin, LMWH, ASA or both combined)would prevent these women from a subsequent abortion. Depending on thrombophilic status the women included in one of the three sub-studies: HABENOX 1 (mild, single thrombophilia), HABENOX 2 (no known thrombophilia), HABENOX 3 (moderate to severe thrombophilia, with combined thrombophilia or moderate to high titer antiphospholipid antibodies).

Study design: Randomised placebo controlled multicenter study.

Number of patients per study: 90 patients per group, 270 altogether.

Timetable: Starting 2/2002, finishing 31.12.2007.

Time frame: >37 weeks of gestation and >24, but <37 weeks of gestation (premature)

Treatment started before 7. gw.

HABENOX 1 and 2:

Study groups:

Group 1 : Enoxaparin 40 mg+ placebo, Group 2: Enoxaparin 40 +ASA 100 mg, Group 3: ASA.


Study groups:

Group 1: Enoxaparin 40 twice daily+ placebo o.d., Group 2: Enoxaparin 40 mg twice daily +ASA 100 mg o.d.

Primary end-points:

Pregnancy outcome: livebirths ( ≥37 weeks of gestation), premature livebirths (≥24, but <37 weeks of gestation)

Secondary end-points: Bleeding complications, intrauterine growth retardation (<-2SD), pre-eclampsia, abruptio placentae,

Ending: In the group of combined medication, tablets will be stopped at 36 weeks of gesta-tion. LMWH will be started in all patients after delivery and continued 6 weeks postpartum.

Condition or disease Intervention/treatment Phase
Habitual Abortion Drug: Aspirin Drug: Klexane Drug: Klexane and ASA Phase 3

  Show Detailed Description

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 220 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Prevention
Official Title: Role of LMWH (Enoxaparine) With or Without Aspirin in the Prevention of Habitual Abortion; Special Attention to the Thrombophilic Status of the Mother
Study Start Date : January 2002
Actual Primary Completion Date : December 2004
Actual Study Completion Date : December 2008

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Blood Thinners
Drug Information available for: Aspirin

Arm Intervention/treatment
Active Comparator: ASA
The patients received either Enoxaparine+placebo, Enoxaparine+ASA (Aspirin 100 mg) or ASA alone.ASA or placebo were blinded in the two first groups.
Drug: Aspirin
ASA 100 mg once daily per os

Active Comparator: Klexane
Clexane (enoxaparine) 40 mg sc
Drug: Klexane
Klexane 40 mg sc once daily (HABENOX 1 and 2), Klexane 40 mg twice daily in HABENOX 3

Active Comparator: Aspirin and Enoxaparine Drug: Klexane and ASA
Klexane 40 mgx 1 sc and ASA 100 mg po

Primary Outcome Measures :
  1. Pregnancy outcome: livebirths (>37 weeks of gestation), premature livebirths (> 24, but <37 weeks of gestation) [ Time Frame: gestational weeks >37 and gestational weeks > 24, but <37 ]

Secondary Outcome Measures :
  1. Bleeding complications, intrauterine growth retardation (<-2SD), pre-eclampsia, abruption placenta [ Time Frame: gestational weeks > 37 and gestational weeks >24, but <37 ]

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Ages Eligible for Study:   Child, Adult, Older Adult
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Habenox 1: Three or more consecutive abortions of first trimester (ad h 12+6 wks) or two second trimester abortions (ad h 13 wks-23+6 wks) or one third trimester abortion (24 weeks or more) with one first-second trimester abortions and one thrombophiliatest positive: F V Leiden (heterozygote) or protein C or S deficiency, or anticardiolipin antibodies (low to moderate level), prothrombin gene mutation, or high level of F VIII.
  • HABENOX 2: The thrombophilic tests above are negative.
  • HABENOX 3:positive combined thrombophilia, F V Leiden (homozygote), anticardiolipin antibodies (high level >40) , lupusanticoagulant, or AT III deficiency.

Exclusion Criteria:

  • History of DVT or pulmonary embolism.
  • Significant bleeding history.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00959621

Helsinki University Hospital
Helsinki, Finland, 00290
Sponsors and Collaborators
Helsinki University
Oulu University Hospital
Karolinska University Hospital
Leiden Hospital, Leiden, The Netherlands
Principal Investigator: Veli-Matti Ulander, MD Helsinki University Hospital, Finland
Study Chair: Laure Morin-Papunen, MD Oulu University Hospital
Study Chair: Katja Lampinen, MD Karolinska University Hospital
Study Chair: Kitty Bloemenkamp, MD Leiden University Hospital, Leiden, The Netherlands
Study Chair: Janvier Visser, MD Leiden University Hospital, Leiden, The Netherlands

Responsible Party: Professor Risto Kaaja, Helsinki University Hospital Identifier: NCT00959621     History of Changes
Other Study ID Numbers: HABENOX
First Posted: August 14, 2009    Key Record Dates
Last Update Posted: August 14, 2009
Last Verified: August 2009

Keywords provided by Helsinki University:
Habitual abortion
recurrent abortion
hereditary and acquired
premature birth
LMWH (low molecular weigh heparin)

Additional relevant MeSH terms:
Abortion, Habitual
Abortion, Spontaneous
Pregnancy Complications
Heparin, Low-Molecular-Weight
Anti-Inflammatory Agents, Non-Steroidal
Analgesics, Non-Narcotic
Sensory System Agents
Peripheral Nervous System Agents
Physiological Effects of Drugs
Anti-Inflammatory Agents
Antirheumatic Agents
Fibrinolytic Agents
Fibrin Modulating Agents
Molecular Mechanisms of Pharmacological Action
Platelet Aggregation Inhibitors
Cyclooxygenase Inhibitors
Enzyme Inhibitors