Uterine septum is a kind of uterine malfunction in which the partition that forms when Mullerian ducts fuse during embryogenesis is not resorbed. The condition may be a complete septum or subseptate. A complete septum splits the uterine cavity into two. A subseptate uterus forms when resorption process is incomplete. The underlying causes of uterine septum are unclear. This condition may cause miscarriages and premature birth. Medical imaging techniques such as 3-D ultrasonography may help diagnose it. One way to manage it is by hysteroscopic removal of the septum.