Müllerian ducts are paired structures that develop in the early stages of embryonic development in mammals. They are crucial for the formation of female reproductive organs, including the uterus, fallopian tubes, and part of the vagina. In the absence of male hormones, these ducts differentiate into female reproductive anatomy. In males, the presence of testosterone leads to the regression of Müllerian ducts, while the Wolffian ducts develop into male reproductive structures. The study of Müllerian ducts is important in understanding congenital anomalies and disorders of sexual development, as abnormalities can lead to conditions such as Müllerian agenesis.