What causes a bicornuate uterus?

What causes a bicornuate uterus?

A bicornuate uterus is congenital, meaning you were born with it. Your uterus forms while you’re still in the womb — sometime between 10 and 20 weeks of pregnancy.

During development, two ducts (called the Mullerian ducts) normally fuse together to form one uterine cavity. In the case of a bicornuate uterus, two uterine cavities exist because the ducts did not merge together completely. A bicornuate uterus can have a deep heart shape or it can be minor and never cause a problem.

A heart-shaped uterus is not hereditary — meaning you won’t pass it on to your children.