Hello again and congrats! Yes, the elevated IRT is a signpost for CF, that's what they look for in the heel prick and how they decide to send those samples on for further testing. Our daughter has exactly the same gene combo, DF508 and R1162X and is very well. I know three women in America with the same genes and they have even said they have been told R1162X is a 'mild' gene. I know we shouldn't have expectations just because of genes, but out experience has been very positive. Freya had elastase less than 15! Very low! Even so, she takes a moderate dose of Creon, up to eight caps a day and her maximum would be 13. So low elastase is not something to dread. You will get into a rhythm with the Creon an not even notice you're doing it. While Liam is so tiny, do keep him away from anyone coughing or sneezing, and if people hold him, have them wash their hands and hand gel too. It's good to be careful when they are new. But don't worry, that doesn't last! Freya went to her first party with other kids last week, she had a ball and you would never know there is anything 'wrong' with her. I know it's so very hard at first but it does get better. You can always message me if you need anything. Congrats again! Xx