[Defects in the prostaglandin system. IV. Inborn, nonfamilial plasma factor deficiency].

On routine screening of 143 newborn infants, complete plasma factor deficiency was discovered in 4 cases. All the relatives, however, exhibited normal plasma factor activity. Up to now all 4 babies are healthy. Long-term follow up should clarify whether an inborn plasma factor deficiency might predispose to diseases accompanied by haemostatic imbalance.