Magnetic resonance imaging (MRI) was used to study Mayer-Rokitansky-Kuster-Hauser (MRKH) syndrome in two 21-year-old women. In one case MRI revealed that fluid filled an area of the uterus measuring about 4 x 4cm, but that the ovaeies were normal ; in the other case, a rudimentary uterus and normal ovaries were seen. MRI is useful both in the planning of surgical management and in evaluating the details of pelvic anatomy and uterine morphologic characteristics.