Uterine septum (uterine cavity) or partitioned uterus is the most common deformity of the uterus and accounts for about 30% of all congenital deformities of the uterus. 2-3% of women have a uterine septum.
This separating septum is composed of muscle and mucosa-endometrium.
The endometrium covering the septum has a different cell structure than the endometrium of the uterine cavity.
The uterine septum gives no symptoms. It is most often detected during a regular ultrasound examination or during an examination of the cause of spontaneous abortions.
The uterine septum is formed before birth. The uterus is formed by the joining of the two Müllerian ducts. The central part of the two joined ducts disappears during embryonic development. If the central part of the two joined ducts does not disappear, a partition of the uterine cavity-septum is formed. The septum can be the entire length or only in one part of the uterine cavity.