Generality
The septum uterus is a congenital anomaly of the uterus.
Like the bicornuate uterus and the didelph uterus, it represents one of the seven anomalies of the Müllerian ducts, pathologies with unknown causes that originate from a development error during embryonic life.
Figure: depiction of a septal uterus.
From the site: mulleriananomalies.blogspot.it
The presence of the septum uterus often causes unpleasant consequences during a pregnancy (spontaneous abortion, premature birth and poor positioning of the fetus).
For an accurate diagnosis, the pelvic examination is not sufficient. In fact, instrumental tests are necessary.
If the presence of the uterus septum has no consequence on the ability to have children, doctors prefer not to intervene. If, on the other hand, the aforementioned uterine anomaly repeatedly hinders any attempt to become pregnant, they deem it advisable to operate surgically.