Thomas describes how he transformed into a man -- wearing men's clothes initially then making the decision to have his breasts altered.
"Since we're in the genital area, let's just get it over with and keep going," Oprah asks. "Let's get to the penis part."
Thomas reveals he opted not to do anything to his reproductive organs because he wanted to have a child one day.
"That's so interesting," Oprah says, expressing how Thomas had the feelings of being a man, yet wanting to give birth to a child.
After taking testosterone, Thomas describes how his clitoris got larger and began to form a small penis.