Urogenital SystemWolffian DuctsPAX2 Transcription FactorUreterUrogenital AbnormalitiesGenitalia, MaleGene Expression Regulation, DevelopmentalHomeodomain ProteinsMesodermIn Situ HybridizationTranscription FactorsPaired Box Transcription FactorsPAX7 Transcription FactorKidneyPAX9 Transcription Factor