A double uterus, also known as a didelphys uterus, is a rare condition in which a woman has duplication of the uterus. Although the exact reason why this congenital abnormality develops is unknown, it represents a lack of fusion of early embryonic structures.
Overall, about 1 in 80-90 births in Australia is a twin and of these about 30% are MZ(monozygotic or identical (MZ).
Double uterus with no signs or symptoms, treatment is rarely needed. Surgery to unite a double uterus is rarely done ? although surgery may help you sustain a pregnancy if you have a partial division within your uterus and no other medical explanation for a previous pregnancy loss.
On research it is found that , Although the exact cause is unknown, the developmental basis for having this condition is well understood. In normal female embryos, the reproductive tract is made from structures called the M�llerian ducts, which derive from early precursors of the kidneys. Sometimes this process of joining the tubes together is unsuccessful, and without the fusion of the M�llerian ducts, two uteri form.