Bicronuate Or Double-Horned Uterus

Description

Bicornuate uterus anatomy is organized around a deep fundal cleft that separates the uterine body into right and left uterine horns. Within the opened cavity, two endometrial channels diverge superiorly and remain partially divided by a wedge of myometrium, while converging inferiorly toward a single lower uterine segment and cervical canal. Each horn forms a distinct cornu at its superolateral margin, the expected attachment region for the uterine tube and the utero-ovarian ligament. Serosal contour remains external, but the emphasis here is the internal partitioning. This configuration reflects incomplete fusion of the paramesonephric (Mullerian) ducts and carries recognizable obstetric associations: first and second trimester pregnancy loss, preterm birth, fetal malpresentation, and asymmetric uterine distension with pain that can mimic other causes of acute pelvic discomfort. Differentiation from a septate uterus matters, because a septate cavity often benefits from hysteroscopic septum resection, while a true bicornuate uterus more often requires diagnosis and counseling rather than operative correction, and when surgery is considered, it tends toward abdominal or laparoscopic metroplasty in selected recurrent-loss cases. The fixed internal perspective makes the relationship between the duplicated endometrial cavities and the external fundal indentation easy to reconcile, mirroring how clinicians interpret 3D ultrasound and MRI for Mullerian anomaly workup. Two horns. One uterus. Use this illustration in reproductive anatomy and embryology teaching to anchor discussions of uterine development, or in OB/GYN and radiology materials covering infertility evaluation, recurrent pregnancy loss, and congenital uterine anomalies with correlative hysterosalpingography or MRI findings. It also suits patient-facing counseling documents when you need a precise visual explanation of why implantation and uterine expansion may differ between horns. Anatomical accuracy verified by SciePro's Medical Advisory Board.