Affiliation:
1. The MRC Epidemiology and Medical Care Unit, Northwick Park Hospital, Harrow, Middlesex, U. K.
Abstract
SummaryA study has been undertaken in 72 women to provide systematic information on the changes that occur in a wide range of haemostatic variables during and after pregnancy. Factors VII, VIII :C, VIIIR:Ag, X, fibrinogen and α1 antitrypsin, rose markedly throughout pregnancy. Factors II and V and α2 macroglobulin all rose early on but then decreased steadily. Antithrombin III: C and Ag fell slightly. There was a marked decrease in fibrinolytic activity from 11-15 weeks onwards. Levels of fibrin degradation products rose from 21-25 weeks onwards. The rise in coagulation factors that occurs could be due to increased synthesis or increased activation by thrombin, or to both. The findings are consistent with a mild degree of local intravascular coagulation from early on in pregnancy in some women.
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416 articles.
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