17‐β‐OESTRADIOL AND THE FIBRINOLYTIC ACTIVITY OF VEIN WALLS

Summary Coagulation and fibrinolytic studies were performed on 16 postmenopausal women before and during treatment with 10 mg. of 17‐β‐oestradiol a day for 10 days. The fibrinolytic activity in the wall of a biopsy specimen of a superficial vein was determined histochemically and was unchanged. The concentration of antithrombin III decreased slightly from a mean of 105 per cent to 90 per cent.