D-dimer testing in pregnancy

Area of Science:

• Obstetrics and Gynecology
• Hematology
• Thrombosis Research

Background:

• Pregnancy induces a hypercoagulable state, increasing risks of venous thromboembolic events.
• Elevated D-dimer levels are common in normal pregnancy, indicating heightened coagulation and fibrinolysis.
• Current D-dimer testing for pregnancy complications is challenged by physiological increases.

Purpose of the Study:

• To evaluate the utility of D-dimer testing in pregnant women for diagnosing venous thromboembolic events and pregnancy complications.
• To assess the effectiveness of D-dimer in monitoring antithrombotic therapy during pregnancy.
• To address the need for validated, gestational age-specific D-dimer reference ranges.

Main Methods:

• Review of coagulation and fibrinolytic system activation markers during pregnancy.
• Analysis of D-dimer levels in uncomplicated pregnancies and those receiving thromboprophylaxis.
• Evaluation of D-dimer changes in relation to gestational age.

Main Results:

• Normal pregnancy is characterized by a significant increase in D-dimer levels.
• Elevated D-dimer is observed even with low-molecular-weight heparin (LMWH) thromboprophylaxis.
• Gestational age-specific reference values for D-dimer are necessary for clinical application.

Conclusions:

• D-dimer elevation in pregnancy requires careful interpretation due to physiological changes.
• Further studies are essential to refine D-dimer's role in diagnosing pregnancy-related thrombotic events.
• Optimal LMWH dosing and monitoring strategies during pregnancy warrant additional investigation.