A septate uterus is a congenital anomaly where a membrane runs down the middle of the uterus, splitting it into two parts. This membrane is called the septum and it can vary in thickness and length. It starts at the top of your uterus and can extend to your cervix (bottom of the uterus) and occasionally to the vagina.
A typical uterus is one hollow cavity and shaped like an upside-down pear. However, if you have a septate uterus, your uterus has two smaller cavities instead of one cavity. This is because the septum acts as a partition, or barrier, in your uterus.
This condition is also referred to as a uterine septum. It can cause symptoms in some people, but most will not be aware they have a septate uterus until they are pregnant or experience multiple miscarriages. If you have a septate uterus, it's still possible to have a healthy pregnancy and delivery.