The first case of a rare mullerian anomaly characterized by the presence of a complete uterine septum with duplication of the cervix and a longitudinal vaginal septum has been reported very recently. We present here three new cases of such an anomaly in an attempt to alert gynaecologists to the possible occurrence of such a malformation. The cases challenge the classical views of unidirectional (caudad to cranial) mullerian development and support the alternative embryologic hypothesis of Muller et al. according to which fusion and resorption begins at the isthmus and proceeds simultaneously in both the cranial and caudal directions.