| Type I: "Müllerian" agenesis or hypoplasia |
| A. Vaginal (uterus may be normal or exhibit a variety of malformations) |
| B. Cervical |
| C. Fundal |
| D. Tubal |
| E. Combined |
| Type II: Unicornuate uterus |
| A1a. Communicating (endometrial cavity present) |
| A1b. Noncommunicating (endometrial cavity present) |
| A2. Horn without endometrial cavity |
| B. No rudimentary horn |
| Type III: Uterus didelphys |
| Type IV: Uterus bicornuate |
| A. Complete (division down to internal os) |
| B. Partial |
| C. Arcuate |
| Type V: Septate uterus |
| A. Complete (septum to internal os) |
| B. Partial |
| Type VI: Diethylstibestrol-related anomalies |
| A. T-shaped uterus |
| B. T-shaped with dilated horns |
