A U.S. congresswoman’s “miracle baby” just celebrated a birthday that some doctors were certain would never happen.

Rep. Jaime Herrera Beutler (R-Wash.) and her husband, Dan, were devastated in late 2012 when doctors informed them that the little girl they were expecting had Potter's Syndrome – a lack of amniotic fluid in utero, which makes the womb shrink and prevents the baby’s development, particularly the kidneys.

'Doctors Gave Her Zero Chance': Lawmaker Gives Birth to Miracle Baby

Doctors told the Beutlers with “100% certainty” Abigail’s condition was “100% fatal,” and she would miscarry or the baby would die shortly after birth.

But the couple disagreed with the diagnosis and felt that they had to fight for Abigail, so they sought experimental treatment, which involved injecting fluid into the womb to facilitate Abigail’s growth and development.

Making her entrance into the world on July 15, 2013, Abigail Rose Beutler became the first baby to survive a Potter’s Syndrome diagnosis. With regular treatments and nightly dialysis at home, she is doing great and recently enjoyed her milestone first birthday with her doting parents.

“She is a happy, healthy growing little baby,” Beutler said. “One of her doctors said she’s a very healthy baby who just happens to not have kidneys.”

That won't be a problem for long, hopefully, because once Abigail is big and strong enough for a kidney transplant, her father has offered to donate one of his kidneys.

Watch the heartwarming segment above from Fox and Friends.

'Miracle Baby' Born 35 Days After Mother's Water Breaks