Abstract
Purpose
To investigate changes and establish reference values in coagulation, anticoagulation, fibrinolysis, anti-fibrinolysis and hemodynamics during normal pregnancy.
Methods
A total of 58 women with singleton pregnancies were recruited. Blood and ultrasound examinations were performed in the 10th–14th, 20th–24th, and 30th–34th weeks of pregnancy. The same examinations were performed in 50 non-pregnant women who were selected as the control group.
Results
Levels of fibrinogen, thrombin time, fibronectin, prothrombin activated fragments 1+2 and thrombomodulin were higher in early pregnancy than those in the control group (P < 0.05). Fibrinogen, prothrombin time, activated partial thromboplastin time, thrombin time, thromboxane B2, prothrombin activated fragments 1+2, thrombomodulin, D-dimer, and plasminogen activator inhibitor-2 were statistically different between the mid pregnancy and the control group (P < 0.05). Meanwhile, fibrinogen, prothrombin time, activated partial thromboplastin time, thrombin time, fibronectin, thromboxane B2, prothrombin activated fragments 1+2, thrombomodulin, and plasminogen activator inhibitor-2 were obviously elevated in late pregnancy as compared with the control group (P < 0.05). Moreover, fibrinogen, thromboxane B2, prothrombin activated fragment 1+2, D-dimer plasminogen, and activator inhibitor-2 gradually increased during pregnancy with some fluctuation. Prothrombin time, activated partial thromboplastin time, thrombin time, international normalized ratio, and thrombomodulin as well as systolic/diastolic ratio, pulsatility index, and resistance index in uterine arteries showed a tendency to decrease in pregnant women.
Conclusions
Coagulation, anti-coagulation, fibrinolytic and anti-fibrinolytic activities are enhanced and balanced at a higher level during pregnancy. In addition, uterine artery and umbilical artery hemodynamics become more baby friendly (i.e., high flow and low resistance).
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Acknowledgments
This work was supported by the tenth-five-years national key scientific and technology projects of the National Department of Technology (2004BA720A06-01), the grants of National Natural Science Foundation of China (81000259, 30973207 and 81070746) and Guangdong Natural Science Foundation (10151008901000007 and 10451008901004246), Fundamental Research Funds for the Central Universities (3161001), and Research Fund for the Doctoral Program of Higher Education of China (20090171120075).
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None of the authors have no actual or potential conflict of interest.
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C. Hui and M. Lili contributed equally to this study.
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Hui, C., Lili, M., Libin, C. et al. Changes in coagulation and hemodynamics during pregnancy: a prospective longitudinal study of 58 cases. Arch Gynecol Obstet 285, 1231–1236 (2012). https://doi.org/10.1007/s00404-011-2137-x
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DOI: https://doi.org/10.1007/s00404-011-2137-x