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A pelvic section of a stage 23 Carnegie embryo (56 days) showing contact of the fusing Müllerian ducts (MD) with the urogenital sinus (UGS). The point of contact of the Müllerian ducts with the urogenital sinus is called the Müllerian tubercle. Wolffian ducts (WD) also join the urogenital sinus just lateral to the Müllerian tubercle. From the Virtual Human Embryo Project (http://virtualhumanembryo.lsuhsc.edu) with permission.
