Double cervix and vagina with a normal uterus: an unusual Mullerian anomaly.

A 34 year old woman presented with primary infertility and duplication of the cervix and vagina. Laparoscopy demonstrated a normal uterus and hysterosalpingography revealed a normal uterine cavity communicating with both cervices. This rare Mullerian anomaly is inconsistent with our current understanding of Mullerian development. An alternative embryological mechanism is reviewed to account for this and other anomalies which do not fit into existing classification systems.