Can a baby born at 27 weeks with 800gms weight surive.what will be the probability of survival.will it have any medical complications if survived?

My grandsons were born at 26 weeks weighed 1 pound 5 ounces that was almost 7 years ago. It was along hall at the hospital but thank the lord they survived. weighs about 36 pounds now and the other 1 weighs about 45 pounds .So an answer to your ? Yes they can live I have 2 living proofs. Twin Boys born in Clinton Iowa and treated in Iowa City Iowa .Gl and god bless