Formation of the scrotum (scrotoplasty) is done during the metoidioplasty. Should you desire, prostheses for testicles could be placed at this time or at later date. Since there is frequently only limited place two tissue expanders in the new scrotum. The permanent prosthesis can be placed in the scrotum at the same time. There is probably no harm in placing two testicular prostheses. If urethral lengthening is done, one must wait three months to have expanders or prosthesis placed.