Speaking during an appearance on Watch What Happens Live on Tuesday night, Chrissy called Meghan "wonderful" and "just as kind as everyone says she is."
"We are shocked and in the kind of deep pain you only hear about," Chrissy wrote alongside a series of photos of herself and husband John Legend in the hospital. "The kind of pain we've never felt before."
"We were never able to stop the bleeding and give our baby the fluids he needed, despite bags and bags of blood transfusions," she added. "It just wasn't enough."
"Jack worked so hard to be a part of our little family, and he will be, forever," she said.