Normal pregnancy is associated with an increase in thrombin generation from the very early stages of the first trimester
| Autor: | Catherine Bagot, Dilys J. Freeman, Fiona Jordan, Christopher C. Onyiaodike, E. Leishman |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Adult
Male medicine.medical_specialty 030204 cardiovascular system & hematology 03 medical and health sciences 0302 clinical medicine Thrombin Natural cycle in vitro fertilization Pregnancy medicine Positive Pregnancy Test Humans Blood Coagulation Blood coagulation test business.industry Obstetrics Hematology Venous Thromboembolism medicine.disease First trimester Venous thrombosis Pregnancy Trimester First 030220 oncology & carcinogenesis Gestation Female Blood Coagulation Tests business medicine.drug |
| Zdroj: | Thrombosis research. 157 |
| ISSN: | 1879-2472 |
| Popis: | Background Pregnancy is a hypercoagulable state associated with an increased risk of venous thrombosis, which begins during the first trimester, but the exact time of onset is unknown. Thrombin generation, a laboratory marker of thrombosis risk, increases during normal pregnancy but it is unclear exactly how early this increase occurs. Methods We assessed thrombin generation by Calibrated Automated Thrombography in women undergoing natural cycle in vitro fertilization, who subsequently gave birth at term following a normal pregnancy ( n = 22). Blood samples were taken just prior to conception and repeated five times during very early pregnancy, up to Day 59 estimated gestation. Results Mean Endogenous Thrombin Potential (ETP), peak thrombin generation and Velocity Index (VI) increased significantly from pre-pregnancy to Day 43 gestation ( p = 0.024–0.0004). This change persisted to Day 59 gestation. The mean of the percentage change from baseline, accounting for inter-individual variation, in ETP, peak thrombin and VI increased significantly from pre-pregnancy to Day 32 gestation ( p = 0.0351– Conclusion Thrombin generation increases significantly during the very early stages of normal pregnancy when compared to the pre-pregnancy state. The increased risk of venous thrombosis therefore likely begins very early in a woman's pregnancy, suggesting that women considered clinically to be at high thrombotic risk should start thromboprophylaxis as early as possible after a positive pregnancy test. |
| Databáze: | OpenAIRE |
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