A bicornuate uterus is a congenital uterine anomaly in which the uterus has two distinct horns or projections at its upper portion, giving it a heart-like shape, while the lower uterine segment and cervix are typically unified. This occurs when the two tubes that normally fuse to form the uterus during embryonic development, called the Mullerian ducts, only partially merge. On ultrasound, particularly three-dimensional ultrasound, a bicornuate uterus shows two separate endometrial cavities in the fundal region with a deep external indentation on the outer surface of the uterus. This anomaly is clinically significant because it is associated with an increased risk of recurrent miscarriage, preterm delivery, and abnormal fetal presentation.
Sonography Term