Arcuate Uterus's Internal Structure, Anterior View

Description

Uterine cavity anatomy in an arcuate uterus is the focus, presented from an anterior perspective with the uterus opened to reveal its internal contour. The fundus sits superiorly and shows a shallow midline concavity projecting inferiorly into the endometrial cavity, while the lateral cornua and tubal ostia lie superolaterally at the uterotubal junctions. Inferior to the cavity, the isthmus narrows toward the internal os and cervical canal, with the endometrium lining the lumen and the surrounding myometrium forming the thicker muscular wall. Arcuate configuration is often discussed in the workup of infertility and recurrent pregnancy loss because it can be confused with a septate uterus on hysterosalpingography, saline infusion sonography, or MRI when only the cavity outline is considered. That distinction matters: a true septum extends further into the cavity and carries different management, while an arcuate fundal indentation is usually a normal variant or mild Müllerian anomaly with limited clinical consequence. The fixed anterior cutaway clarifies what defines an arcuate uterus, the indentation remains confined to the fundal region and the external fundal contour stays broadly convex rather than deeply cleft as in bicornuate morphology. A subtle landmark. Use this illustration in reproductive endocrinology lectures, obstetrics and gynecology curricula covering Müllerian anomalies, and figure plates comparing uterine cavity variants for radiology-pathology correlation. It also suits patient-facing counseling materials that need accurate, non-alarmist depiction of arcuate uterine anatomy during fertility evaluation. Anatomical accuracy verified by SciePro's Medical Advisory Board.