title: Editorial comment.
authors.affiliation: Division of Pediatric Urology, Department of Urology, University of Texas Health Science Center at San Antonio, San Antonio, TX.
authors.forename: Dennis S
authors.initials: DS
authors.lastname: Peppas
mesh_terms: D005260:Female; D047109:Fetal Development; D006801:Humans; D008297:Male; D014521:Urethra / Q000196:embryology*; D001743:Urinary Bladder / Q000196:embryology*