Proviron is a sinthetic, orally effective androgen which does not have any anabolicc characteristic. It is use to ease or cure disturbances caused by a deficiency of male sex hormone but however Proviron has no effect on the body´s endogenous testosterone production only reduce the problems caused by testosterone deficiency. Of course, you can use Proviron in post cycle to eliminate a possible impotency or reduced interest sexual, but this not contribute to restore your endogenous test level and maintain mass that you adquired in cycle.
Bottom line: you must be use HCG and Clomid post cycle to maintain your gains and restore your endogenous test level, using Proviron is you want to avoid any possible reduced sexual interest