When Emmett Hardiman transitioned at age 18, he didn’t think he would ever have his own child. At the time, doctors told the transgender man that long-term testosterone use would probably ruin his reproductive organs, along with any chance of having kids. “It was very much the belief that you could only be on testosterone for so long before you had to get everything removed or you would be very high risk [for cancer] or you were definitely going to be infertile,” Hardiman, 29, told NBC News.