In this radiology lecture, we discuss the MRI appearance of septate uterus, and explain how to differentiate from other uterine anomalies. Key points include: * Most common müllerian duct anomaly (55%): Septal reabsorption abnormality. * Ultrasound and MRI provide assessment of external uterine contour and presence of renal anomalies. * Hysterosalpingogram of limited value, cannot reliably differentiate between subtypes. * On MRI, uterine fundus is typically convex or minimally indented: Fundal cleft less than 1 cm. * Midline septum of variable length, may be muscular or fibrous. * Important to differentiate type of septum as may alter surgical approach. * Compared to bicornuate uterus, higher incidence of reproductive complications (miscarriage). * Treatment: Resection of septum if recurrent fetal loss. Click the YouTube Community tab or follow on social media for bonus teaching material posted throughout the week! Instagram: https://www.instagram.com/radiologistHQ/ Facebook: https://www.facebook.com/radiologistHeadQuarters/ Twitter: https://twitter.com/radiologistHQ