This process usually fuses the two Müllerian ducts into a single uterine body but fails to take place in these affected women who maintain their double Müllerian systems. A  didelphic uterus will have a double cervix and is usually associated with a double vagina.
The fusion of the Müllerian ducts normally creates a single uterine body, but some individuals experience this process failing, resulting in a uterus with two cervixes and a double vagina.