title: Reply to letter to the editor.
authors: Paediatric Surgery. Electronic address: John.Hutson@rch.org.au.
authors: John M
authors: JM
authors: Hutson
mesh_terms: D002454:Cell Differentiation / Q000502:physiology*; D012734:Disorders of Sex Development / Q000503:physiopathology*; D005854:Germ Cells / Q000473:pathology*; D006801:Humans; D008297:Male; D013091:Spermatogenesis / Q000502:physiology*; D013093:Spermatogonia / Q000254:growth & development*