although the detection limit of the assay was as low as 22 pg/ml , vitamin k1 concentration appeared to be still beyond that level in cord blood or in newborn serum within 30 min after birth , whereas vitamin-k-dependent coagulation factors are already at a level of 40 % , without evidence for the presence of descarboxy prothrombin , in any of the investigated neonates .
C0005789
coagulation factors
C0033706
prothrombin