in plasma samples of 11 fetuses of about 20 weeks of gestational age the following coagulation factors have been determined ( mean values found are given in parentheses ) : fibrinogen ( 0.30 u/ml ) , prothrombin ( +/-0.17 u/ml ) , factor v ( 0.28 u/ml ) , factor vii ( 0.21 u/ml ) , factor viii coagulant activity ( factor viii : c ) ( 0.12 u/ml ) , factor viii-related antigen ( factor viiir : ag ) ( 1.04 u/ml ) , coagulant factor viii-related antigen ( factor vii : cag ) ( 0.19 u/ml ) , factor ix coagulant activity ( 0.05 u/ml ) , factor ix antigen ( less than or equal to 0.03 u/ml ) , factor x ( 0,19 u/ml ) and antithrombin iii ( at-iii ) ( 0.23 u/ml ) .
C0005789
coagulation factors
C0015518
factor x