What causes arcuate uterus?

What causes arcuate uterus?

An arcuate uterus is a type of Mullerian duct anomaly. In normal development, the Mullerian ducts join together to form one single uterus and two fallopian tubes. However, if these ducts fail to fuse together, it causes a uterine abnormality. An arcuate uterus means there’s a dent at the top of the uterus where these ducts didn’t fuse.