Mark Zuckerberg Announces He's Going to Be a Dad

— -- Mark Zuckerberg is going to be a dad!

The Facebook CEO, 31, announced the happy news on his Facebook wall that he and his wife, Dr. Priscilla Chan, are expecting a daughter.

In the post, Zuckerberg opened up about the couple's struggles with starting a family and the "lonely experience" of having suffered three miscarriages.

"You feel so hopeful when you learn you're going to have a child. You start imagining who they'll become and dreaming of hopes for their future. You start making plans, and then they're gone," he wrote. "Most people don't discuss miscarriages because you worry your problems will distance you or reflect upon you -- as if you're defective or did something to cause this. So you struggle on your own."

Zuckerberg didn't share the baby's due date but said the pregnancy is "now far enough along that the risk of loss is very low and we are very hopeful."

He even received a happy sign from his daughter in an ultrasound when it appeared she was giving the "thumbs up," -- just like the Facebook like button.

"I'm already convinced she takes after me," Zuckerberg wrote. "We're looking forward to welcoming her into the world and sharing more soon when she's ready to come out and meet everyone!"