During the foetal development, the reproductive system of the female foetus, is preceded by embryonic structures called Müllerian ducts, which are paired ducts that are joined together to form a single larger body: the uterus. However, sometimes these tubes are not attached to the centre of the pelvis, causing uterine malformations. The most common malformations are: unicornuate uterus, caused by the development of only one of the Müllerian ducts while the other one does not develop or does it in a very rudimentary fashion; Uterus didelphys, caused by the failed embryogenetic fusion of the Müllerian ducts; and bicornuate uterus, a malformation caused when the fusion process of the Müllerian ducts’ upper part is altered, making the upper part of the uterus to be bifurcated. A uterine malformation that causes no symptoms does not usually require treatment. However, there is the possibility of having surgery to correct uterine malformations. The surgery can be endoscopic or open abdominal surgery.