Chrissy Teigen and John Legend are mourning after experiencing pregnancy loss.
"We are shocked and in the kind of deep pain you only hear about, the kind of pain we’ve never felt before," she wrote alongside a series of black-and-white photos. "We were never able to stop the bleeding and give our baby the fluids he needed, despite bags and bags of blood transfusions. It just wasn’t enough."
Teigen said they had not officially decided on a name, but had already started calling the child "Jack."
"Jack worked so hard to be a part of our little family, and he will be, forever," she wrote. "To our Jack - I’m so sorry that the first few moments of your life were met with so many complications, that we couldn’t give you the home you needed to survive. We will always love you."
Legend quote tweeted Teigen's post on Wednesday, adding "We love you, Jack."
Earlier this month, the model and cookbook author was put on bed rest and then hospitalized after experiencing bleeding.
Last week, Teigen said she had decided to go to the hospital when things got worse.
"Today the big difference was that it kind of was like if you were to turn a faucet onto low and leave it there," she said. "It was at the point today where it was never stopping bleeding and that's obviously very bad."
The couple share two children, Luna, 4, and Miles, 2. In a 2016 interview with Self magazine, Teigen opened up about how they'd struggled with fertility.
"The big question was why this wasn’t working for us when I was young and he was healthy,” she told the magazine. “I thought, people get pregnant by accident all the time! How does this happen?"
The 34-year-old first announced her pregnancy in August in a new music video for her husband's latest song, “Wild.” It wasn't clear how far along she was in the pregnancy.