Thomas Beatie has given birth to his third child, reports say.
Mr Beatie, who was born female, had his first child in 2008 because his wife Nancy was unable to conceive.
He kept his female reproductive organs after transitioning to become a man ten years ago.
The latest addition to the Oregon-based family has not yet been named but is thought to have been born on July 25th.
A source said: “He’s got light brown hair and blue eyes. He’s very handsome and adorable, and he’s big and healthy.”
The baby joins siblings Susan, two, and brother Austin, one.
Before starting a family, Mr Beatie had been on hormone treatments, but stopped taking them in order to resume menstruating and conceive through artificial insemination.
The couple used sperm donors to conceive their children.
Speaking to Oprah Winfrey in April 2008, he said: “I actually opted not to do anything to my reproductive organs because I wanted to have a child one day. I see pregnancy as a process and it doesn’t define who I am.”