A modified endoscopic technique for the inspection of the uterine cavity is described. The modification consists in the injection of a clear, water‐soluble and viscous dextran solution into the uterine cavity, through which a clear view of the latter is obtained. Thirty cases were examined by this method following hysterography. Comparative studies of the observations made at hysteroscopy and the hysterographic findings in these cases showed that hysteroscopy is of greater diagnostic value than hysterography because the nature and extent of any intrauterine lesion present can be assessed directly.