thromboembolism : `` '' recently published studies in th e united kingdom reveal a significant statistical association between the use of oral contraceptives , venous thrombosis , pulmonary embolism , and possibly cerebral arterial thrombosis . there is no evidence that the risk varies with the duration of use or the type of compound . the excess risk of mortality due to thrombo-embolic disease among women using oral contraceptives in the united kingdom appears to be of the order of 3 per 100,000 per year . further studies should be undertaken in other parts of the world before accepting the above rate generally . the risk to life due to thrombo-embolic disease must be weighed against the mortality of pregnancy and childbirth , which ranges from about 20 deaths per 100,000 pregnancies in developed countries to 300 or more in developing countries . '' ''
C0040038
thromboembolism
C0013922
-emboli