Thomas Beatie, who lives as a male after undergoing surgery and hormone treatment, gave birth at a hospital in Oregon on June 29, according to People magazine.
Both he and the baby are said to be "healthy and doing well".
Beatie, 34, kept female reproductive organs when he legally became a man 10years ago.
The baby was conceived through artificial insemination using donor sperm and Beatie's own eggs.
"The only thing different about me is that I can't breast-feed my baby. But a lot of mothers don't," People quoted Beatie as saying.
He has had his breasts surgically removed.
He said that the baby was not delivered by Caesarean section, but no other details about the birth have been confirmed.
Earlier this year, Beatie caused controversy when his pregnancy was revealed and he appeared on The Oprah Winfrey Show.
His wife Nancy, 46, whom he married five years ago, was unable to conceive because she had already had a hysterectomy.
The couple, who operate a T-shirt printing business in Bend, Oregon, are legally married and he is recognised under state law as a man.
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So if all was well I wouldn't see why he couldn't have a baby naturally. Since everything is still wired up correctly...he just looks like a man.
How come I've been taking my meds"