Transvaginal ultrasonography showing a cross-section of a<unk> , with two cavities (or "horns") to the left and right, respectively. The one to the right contains a gestational sac. Diagnosis of<unk>  typically involves imaging of the uterus with 2D or 3D ultrasound, hysterosalpingography, or magnetic resonance imaging (MRI). On imaging, a<unk>  can be distinguished from a septate uterus by the angle between the cornua (intercornual angle): less than 75 degrees in a septate uterus, and greater than 105 degrees in a<unk> . Measuring the depth of the cleft between the cornua (fundal cleft) may also assist in diagnosis; a cleft of over is indicative of<unk> . Classification<unk>  is typically classified based on whether or not the division extends to the external cervical os.<unk>  uteri with a division above the os are called<unk>  unicollis and those with a divided os are called<unk>  bicollis. There is a continuous range of the degree and location of the fusion of the paramesonephric ducts, and existence of a spectrum, rather than a fixed number of types corresponding to strict medical definitions. Two processes that occur during the embryonic development of the paramesonephric ducts — fusion and reabsorption — can be affected to different degrees. There is also a hybrid<unk> : External fundal depressions of variable depths associated with a septate uterus can be seen by laparoscopy, indicating the coexistence of the two anomalies. These cases are candidates for hysteroscopic metroplasty under appropriate sonographic and/or laparoscopic monitoring. An obstructed<unk>  showing uni or bilateral obstruction might also be possible. The unilateral obstruction is more difficult to diagnose than the bilateral obstructive. A delay in the diagnosis can be problematic and compromise the reproductive abilities of those cases.
Bicornuate uterus
Unicornuate uterus
Arcuate uterus
Couvelaire uterus
T-shaped uterus
Retroverted uterus
Ectopic decidua
Peritoneal inclusion cyst