I am the mother to a 3 month old baby boy who has been diagnosed with vanishing testis syndrome. He is fully developed as a boy but some time after 7 months of pregnancy his testicles twisted, lost blood supply and have died. Doctors have told us he will need testosterone replacement to go through puberty and will need testicular implants. I was wondering is there is anyone who has been through or knows someone who have been through this. Any information would be helpful. My husband and I are concerned about his penis size and growth, whether he will be able to have an erection, have sex, orgasm. We are also concerned of him psychologically and worried of him being depressed or feeling different. The affects of testosterone replacement and any other information would be great.