The 35-year-old gave birth to a baby girl in Oregon last July and on Tuesday celebrated the arrival of a second child, a baby boy, ABC News reported.
Mr Beatie was last year dubbed the 'pregnant man' after appearing on Oprah Winfrey's television talkshow to discuss his pregnancy.
"I feel it's not a male or female desire to have a child. It's a human need. I'm a person and I have the right to have a biological child," he said.
Mr Beatie revealed that he'd been "shocked" by the amount of publicity the couple had received, insisting they were just like any other family.
"We are a man, woman and child. It's ironic that we are so different but yet, we're just a family, just the same as anyone else," he said.
When asked why he made many people uneasy, he said, "I think that people are not used to seeing the image of a pregnant man.
"And it's causing a lot of people to think. … I used my female reproductive organs to become a father."