Super fit model Sarah Stage gives birth to 8-pound baby

Considering many of the new mom's pregnancy photos looked like she just had a big lunch, her son's size is considerably larger than expected.

Stage told Entertainment Tonight she had only gained 20 pounds during the pregnancy. "The doctor said my baby is healthy. All my girlfriends that are pregnant now, their bellies are a lot bigger, so I asked him and he started laughing. He was like, 'You're fine,'" she said.