Uterus Didelphys, Internal Anatomy

Description

Uterus didelphys is shown with complete duplication of the uterine body, creating two separate endometrial cavities divided by a full-thickness myometrial septum and separated externally by paired uterine fundi. Each hemiuterus narrows inferiorly into its own endocervical canal, forming two distinct cervices positioned side by side in the midline pelvis. Superiorly, the uterine cavities are oriented toward their respective cornual regions where the fallopian tubes would typically attach, while inferiorly the duplicated cervical canals align toward the vaginal apex, a relationship that often coexists with a longitudinal vaginal septum. This configuration matters because uterus didelphys sits on the severe end of Müllerian duct anomalies, and its anatomy changes obstetric mechanics more than a simple septate uterus does. Recurrent pregnancy loss, malpresentation, preterm birth, and fetal growth restriction are common counseling points, and the presence of two cervices influences how you document cervical length and how you plan cerclage when indicated. One cervix can be missed. The fixed internal perspective in this illustration makes the complete separation of the cavities and the individual cervical canals unambiguous, which helps distinguish didelphys from bicornuate uterus (partial fusion) and from septate uterus (single external fundus with an internal septum). Use this illustration in reproductive anatomy and embryology teaching to link Müllerian development to adult uterine morphology, and in OB-GYN references discussing infertility workup, recurrent miscarriage evaluation, and pregnancy management in congenital uterine anomalies. It also suits patient-facing surgical counseling materials when explaining why hysteroscopic septum resection is not the appropriate framework for true didelphys. Anatomical accuracy verified by SciePro's Medical Advisory Board.