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Routine coagulation tests in cases of missed abortion--is it really necessary?

Many gynaecological units have a policy of performing routine coagulation tests in cases of missed abortion. For many years now, it has been accepted practice in our unit to perform routinely a platelet count, bleeding time (BT), clotting time (CT) and plasma fibrinogen (P. fib) level prior to evacuation in cases of missed abortion. We are not sure how or why these 4 tests came to be chosen as a coagulation 'screen'. As they are not totally adequate in detecting disseminated intravascular coagulation (DIC), we wondered if these tests added to the management in any way.