Fig. 1

Embryology of the female genito-urinary tract. a Development of the genital ducts in the female (frontal view, 7–8 weeks). The formation of the uterine primordium and the opening of the mesonephric ducts into the urogenital sinus are shown. The Müllerian tubercle can be seen between both Wolffian ducts and the ureteral buds sprouting from the opening of the Wolffian duct into the urogenital sinus. MD, Müllerian ducts; WD, Wolffian ducts; K, kidney; MT, Müllerian tubercle; US, urogenital sinus. b On a diagram of the embryology of the female genital tract, the places and suggested pathogenesis for the origin of the different groups of malformations included in the embryological and clinical classification [8, 10] are shown