One reason to wait a year is that once you start using TRT your body won't make it naturally, or will have a more difficult time making it naturally. I'm in that position now--it's been a year since six months of Orgovyx but my T has not recovered. The medical oncologist told me he's fine with me supplementing T at this point if I choose but my radiation oncologist advised against it so I have to decide. It's kind of a rock and a hard place--with hypogonadism I feel crappy and my bones are going to hell but I'm also terrified that starting T might reignite the cancer.