A 25-year-old Spanish man who was born a woman is pregnant with twins.
Ruben Noe Coronado interrupted the process of changing genders to preserve the female reproductive organs and give birth.
It was after undergoing fertility treatment that Coronado became pregnant.
Doctors had told his girlfriend, the mother of two children from a previous relationship, she couldn't have any more children.
Coronado, born a woman called Estefania or Stephanie and still considered female under Spanish law, is due to give birth at the end of September.
Afterward, he plans to complete sex-change surgery, marry partner Esperanza Ruiz, 43, and assume the role of the babies' father.
"It's like being born with three hands. You take advantage of them while you have them and you get rid of one of them when they get in the way," The Telegraph quoted Coronado, an epileptic who was adopted as a child, as saying.
He said he would not sell his story "now or in the future", but admitted he was "thinking of selling the picture everyone's going to want of me looking pregnant.
"If I don't do it, someone else will and they'll make a fortune," he added.
He is the first Spanish transsexual to fall pregnant and it is thought he will become the world's first transsexual father of twins if everything goes according to plan.