Mark Zuckerberg and wife Priscilla Chan are expecting their first child.

The Facebook founder announced the big news on his social network, posting a photo of him and his wife, who is a doctor, and their beloved dog Beast.

“We’ve been trying to have a child for a couple of years and have had three miscarriages along the way…It’s a lonely experience,” he wrote. “We hope that sharing our experience will give more people the same hope we felt and will help more people feel comfortable sharing their stories as well.”

Priscilla and their baby girl are healthy, he said. “I’m extremely excited to meet her… In our ultrasound, she even gave me a thumbs up “like” with her hand, so I’m already convinced she takes after me.”

Read his full post below: