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Increased thrombin generation in normal pregnancy.

S Pinto1, R Abbate, C Rostagno

  • 1Clinica Medica I, University of Florence, Italy.

Acta Europaea Fertilitatis
|September 1, 1988
PubMed
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Pregnancy shifts the blood clotting system towards a hypercoagulable state, increasing thromboembolism risk. This study observed elevated fibrinopeptide A and altered inhibitor levels throughout gestation.

Area of Science:

  • Obstetrics and Gynecology
  • Hematology
  • Thrombosis Research

Background:

  • Pregnancy is associated with an increased risk of thromboembolism.
  • The hemostatic balance undergoes significant changes during gestation.

Purpose of the Study:

  • To investigate thrombin generation during normal pregnancy.
  • To evaluate changes in blood clotting inhibitors and platelet activation.

Main Methods:

  • Longitudinal study of 24 pregnant women across three trimesters.
  • Measured plasma fibrinopeptide A, antithrombin III activity, protein C levels, and platelet aggregability.

Main Results:

  • Significant increase in fibrinopeptide A levels from the first trimester.

Related Experiment Videos

  • Slight decrease in antithrombin III activity and moderate increase in protein C during pregnancy.
  • Evidence of slight platelet activation in the second and third trimesters.
  • Conclusions:

    • Pregnancy establishes a new equilibrium in the blood clotting system, favoring a hypercoagulable state.
    • These hemostatic changes contribute to the elevated risk of thromboembolism during pregnancy.