Logan Stevenson was born with a rare genetic disorder, Fanconi anaemia, that often leads to cancer.

"I held him all day he was comfortable with his medication then at 8:18 my son took his last breath in my arms Logan passed away im so sad upset and im in disbelief he is with angels and he's in no more pain," Logan's mother Christine said in a post on her Facebook page.

Logan's parents, Christine and Sean Stevenson, had moved up the date of their wedding to ensure he would be alive to share in the ceremony held on August 3 in Jeannette.

Doctors said on July 26 that Logan had only a few days.