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Congenital thrombophilia

I D Walker1

  • 1Department of Haematology, Glasgow Royal Infirmary, UK.

Bailliere'S Clinical Obstetrics and Gynaecology
|March 7, 1998
PubMed
Summary
This summary is machine-generated.

Heritable thrombophilia, including antithrombin (AT) deficiency and protein C/S (PC/PS) defects, increases pregnancy risks. Focus screening on symptomatic women and families for personalized management and prophylaxis.

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Area of Science:

  • Genetics
  • Hematology
  • Obstetrics

Background:

  • Familial venous thrombosis is linked to heritable defects like antithrombin (AT), protein C (PC), and protein S (PS) deficiencies, and Factor V Leiden mutation.
  • These defects elevate risks for pregnancy-associated venous thrombosis, fetal loss, and other vascular complications, particularly with AT deficiency.
  • Congenital thrombophilia is increasingly viewed as a multigene defect, with AT or PC-PS system abnormalities representing only a portion of genetic predisposition in affected families.

Purpose of the Study:

  • To review the association between heritable thrombophilia and pregnancy complications.
  • To discuss current recommendations for screening and management of women with thrombophilia.
  • To highlight the importance of individualized risk assessment and prophylaxis strategies.

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Main Methods:

  • Literature review of studies on heritable thrombophilia and pregnancy outcomes.
  • Analysis of genetic defects associated with venous thrombosis.
  • Evaluation of management strategies for pregnant women with thrombophilia.

Main Results:

  • Heritable thrombophilia significantly increases risks of venous thrombosis, fetal loss, and vascular issues during pregnancy.
  • Antithrombin deficiency poses the greatest risk among the studied defects.
  • Current evidence suggests focusing screening and resources on symptomatic individuals and families rather than population-wide screening.

Conclusions:

  • Screening women from symptomatic families for AT, PC, or PS deficiencies is recommended, ideally around puberty for education and counseling.
  • Pregnancy planning and individualized management are crucial for women with thrombophilia.
  • Anticoagulant prophylaxis strategies vary based on the specific defect, with AT deficiency often requiring lifelong prophylaxis, while PC/PS defects may necessitate targeted prophylaxis during late pregnancy and postpartum.