[Artificial ripening of the cervix by local action of maternal leukocytes]

The known failures and risks of inducing labour ought to provoke research for novel techniques. Comparison of the results of different methods of established harmlessness must comply with the strict rules found occasionally in the literature. The necessary maturation of the cervical tissue seems an indispensable requirement. Known physiological facts readily call to mind the role played by the granulocytes in collagenolysis. Clinical tests based on them give results identical with other techniques.