| differences in coagulation and haemostatic parameters in normal women of childbearing age from different ethnic groups and geographical locations. task force on oral contraceptives--who special programme of research, development and research training in human reproduction. | a comparative study of coagulation and fibrinolytic laboratory parameters was undertaken in four countries (salvador, brazil; singapore; santiago, chile and dublin, ireland) among apparently healthy women of reproductive age. a continuous external quality control scheme of the laboratory measurements was employed to permit comparison among centres. significant and consistent differences were found between the four centres. in dublin, the prothrombin time and activated partial thromboplastin time ... | 1986 | 3750268 |