Mid-sagittal sections of a 16-week male pelvis. A–C stained for FOXA1 and keratin 10 (K10), D–G stained for smooth muscle myosin heavy chain 2 (SM-MHC2) and myosin heavy chain (MHC), J–L stained for keratin 6 and 7 (K6 & K7), H & I stained for S100 and M stained with H & E, which is a low power image showing the location of A–I. Note the mirror expression of FOXA1 and KRT7 in the bladder, bladder neck and the urethra.