Gary Rohan has addressed the loss of one of his twin daughters, Willow Nevaeh, in an Instagram post this afternoon.
The Sydney Swans player and his wife Amie welcomed Willow and her sister Bella Rae at 9am on Thursday morning but Willow sadly passed away five hours later as a result of anencephaly.
The condition, a fatal neural tube defect, affects the development of baby's brain, skull and scalp and has no cure.
While Gary and Amie knew 11 weeks into their pregnancy that Willow wouldn't survive childbirth, Gary said on Friday that they had "soaked up every second" they had together.
"The most perfect little souls we have ever laid eyes on, we feel so truly blessed to be your parents," he wrote.
"Amie, Bella and I soaked up every second we had with Willow, making as many lasting memories as we could all together.
"It's those little moments we know we will never get back, and we will forever cherish the time we spent as our little family of four, before our darling Willow grew her little angel wings.
"Our little angel Willow, oh how much you taught us in your precious 5 hours here."
Gary went on: "Yesterday was one of the hardest days Amie and I have ever had to deal with. It was a day full of many mixed emotions and you, our team, made everything so perfect.
"Words truly can't express how grateful we are."
Bella, Gary said, is "currently getting some special care" but "all in all doing well".
Gary will sit out this weekend's match against the Western Bulldogs to be with Amie and Bella.