New Baby and speculation on CF

Good Morning, I have a few questions. My grandson has CF and he is 2 1/2. My daughter just had baby #2 and we have already started to worry and speculate about whether he will have CF also? What should we look for at this stage? He is 4 days old. I know weight, but we have no way to weigh right now till he goes to dr on Saturday. He eats great....she is breastfeeding. It's hard to tell from stool....it looks like what it should from a breastfeeding baby. We have licked him...LOL, but no salty taste. Would you necessarily taste the saltiness this soon? Any ideas would be appreciated.
Source: Cystic Fibrosis Pregnancy Forum - Category: Respiratory Medicine Authors: Tags: Pregnancy Source Type: forums