Complex sentence: A bicornuate uterus, commonly referred to as a "heart-shaped" uterus, is a type of an uterine malformation where two "horns" form at the upper part of the uterus.
Split into simpler sentences: A bicornuate uterus, commonly referred to as a "heart-shaped" uterus, is a type of an uterine malformation. Two "horns" form at the upper part of the uterus.