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Thromb Haemost 2007; 97(04): 552-557
DOI: 10.1160/TH06-09-0542
Blood Coagulation, Fibrinolysis and Cellular Haemostasis
Schattauer GmbH

Haemostatic changes related to fibrin formation and fibrinolysis during the first trimester in normal pregnancy and in recurrent miscarriage

Rita Marchi
1   Centro de Medicina Experimental, Laboratorio de Hemostasia, Instituto Venezolano de Investigaciones Científicas, IVIC, Caracas, República Bolivariana de Venezuela
,
Ysabel López Ramirez
1   Centro de Medicina Experimental, Laboratorio de Hemostasia, Instituto Venezolano de Investigaciones Científicas, IVIC, Caracas, República Bolivariana de Venezuela
,
Chandrasekaran Nagaswami
2   Department of Cell and Developmental Biology, University of Pennsylvania, School of Medicine, Philadelphia, Pennsylvania, USA
,
Leona Masova
2   Department of Cell and Developmental Biology, University of Pennsylvania, School of Medicine, Philadelphia, Pennsylvania, USA
,
Anibal Pulido
3   Facultad de Medicina, Escuela Luis Razetti, Departamento de Obstetricia y Ginecología, Cátedra de Clínica Obstétrica A, Hospital Universitario de Caracas, Caracas, República Bolivariana de Venezuela
,
José López Mora
3   Facultad de Medicina, Escuela Luis Razetti, Departamento de Obstetricia y Ginecología, Cátedra de Clínica Obstétrica A, Hospital Universitario de Caracas, Caracas, República Bolivariana de Venezuela
,
Aixa Muller
3   Facultad de Medicina, Escuela Luis Razetti, Departamento de Obstetricia y Ginecología, Cátedra de Clínica Obstétrica A, Hospital Universitario de Caracas, Caracas, República Bolivariana de Venezuela
,
Carmen Luisa Arocha-Piñango
1   Centro de Medicina Experimental, Laboratorio de Hemostasia, Instituto Venezolano de Investigaciones Científicas, IVIC, Caracas, República Bolivariana de Venezuela
,
John W. Weisel
2   Department of Cell and Developmental Biology, University of Pennsylvania, School of Medicine, Philadelphia, Pennsylvania, USA
› Author AffiliationsFinancial support: This work was partially supported by NIH grant HL 30954 and a fellowship to Ysabel López from FONACIT.
Further Information

Publication History

Received 26 September 2006

Accepted after resubmission 31 January 2007

Publication Date:
24 November 2017 (online)

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Summary

We have studied some biophysical properties of the fibrin network during the normal state of pregnancy and in patients with recurrent miscarriage (RM), in the first trimester of pregnancy. The fibrin polymerization process, followed by turbidity, showed that the rate of fibrin monomer assembly and the final turbidity was increased in the pregnant group (normal and with history of RM) compared to non-pregnant women (normal and RM), which is consistent with the increased fibrinogen concentration during pregancy. No changes were observed in the Darcy constant (Ks) of RM clots, pregnant or not; however, in pregnant control subjects the Ks increased (p=0.03).The fibrin lysis rate was increased in pregnant women compared to non-pregnant, being faster in women with RM. The rheological properties of the fibrin network in the non-pregnant group (control and RM patients) were similar; in the pregnant state, the fibrin network of the control group was 1.3 times stiffer compared to the control non-pregnant women, and almost unchanged in RM patients. In this study we have found changes in the clot structure that seem to be related to normal pregnancy and an increased rate of the fibrin lysis process in the RM patients, which may have clinical relevance.

Keywords

Pregnancy - recurrent miscarriage - clot structure - internal fibrinlysis - rheological properties
 

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