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Fibrin/fibrinogen degradation products (FDP) and fibrin monomers might occur as a sign of "athological proteolysis" in complicated pregnancies such as toxaemia, hepatosis and placental insufficiency, eut also in otherwise clinically uncomplicated pregnancies. 18 pregnant women with increased proteolysis, but without any other clinical symptoms of complications were therefore investigated to determine the outcome of their pregnancies. The investigation showed that proteolysis with moderately increased serum FDP and fibrin monomers but without any other clinical signs of complications of pregnancy need not necessarily imply any risk to the mother or the foetus.

Fibrin degradation products (F.D.P.) were determined in the serum of 163 women in whom ovarian tumours had been suspected on palpation at gynaecological examination and who were afterwards examined by laparoscopy or subjected to laparotomy. F.D.P. were found in the serum (0.5-30 mg/100 ml) of 23 (72%) out of 32 patients with malignant tumours. Of 131 patients with benign findings F.D.P. (traces to 2 mg/100 ml) were found in six (4.5%), and in most of these the occurrence of F.D.P. could be explained on other clinical grounds. The findings suggest that the examination of F.D.P. in suspected malignant ovarian tumour may be of diagnostic value.Determination of F.D.P. in malignant ascitic fluid showed very high values, ranging between 40 and 350 mg/ 100 ml. This argues for the occurrence of F.D.P. in the blood being due to an extravascular breakdown of fibrin caused by tumour cells, but they may also be due to thromboplastic and fibrinolytic agents from the tumour entering the blood stream.