Alex Dorroch, who is now one, was given the prognosis when he was 24 weeks in his mum Katrina's womb.
Katrina, 25, was diagnosed with parvovirus during her pregnancy and it led to Alex developing the rare condition hydrops fetalis.
As the baby's organs began to shut down, Katrina developed mirror syndrome, which meant her organs were shutting down simultaneously.
Alex's life was saved by three intra-uterine transfusions and now mother and baby have fully recovered.
In each case, Alex was given about a teaspoon of O negative blood. Now Katrina and partner Daryll Moffat, from Irvine, Scotland, have appealed for people to give blood before they go off on their holidays.
Championing Blood Donor Week 2012, Katrina said: "We'd urge everybody to support Blood Donor Week because one donation can save a life like Alex's."
Blood donations drop most summers, and doctors are worried major public events, such as the Diamond Jubilee, Euro 2012 and the Olympic Games, might lead to fewer donations.
Katrina said: "We know how lucky we are to have our wee miracle. Alex was delivered to us safely at 36 weeks and the life-saving transfusions that he received were only thanks to blood donors."
Find out where you can give blood here.