Have been on tt thetapy. can i get my testicles to work bt themesleves again and get back to original size ?

Stop therapy: If you stop therapy, they should slowly return to normal. May take months.

Maybe (not) . . .: Testicular atrophy is a known side effect of testosterone replacement since you're essentially shutting down your own production, which also renders you essentially infertile. Hcg can be used off-label in an (expensive) attempt to reverse atrophy. It can also be used alone to stimulate t production. Clomiphene ; tamoxifen can also be used off-label to increase t production w/o risk of atrophy.