of joy jen and drew never thought they'd experience in november even more joy when jen gave birth to their son benjamin with a uterus from a deceased donor. >> i was so excited something that i thought never would happen happened. >> reporter: today doctors at penn medicine explained the procedure offering hope to the 5% of women with uterine infertility. >> they have functional ovary and eggs but they can't get pregnant because they don't have a uterus >> reporter: at 17 she was told she could never bear children. >> it wasn't you have to take extra steps. it was it's not possible. >> reporter: the transplant took ten hours. six months later, jen was pregnant the first such baby was delivered in brazil a year ago. the cleveland clinic did it again in june baby benjamin is number three in the world. today, the donor's mother said in a statement her daughter was the best mother she ever knew. >> i think there's no measure to how important that is and