Claudette, Here's my perspective...
cf babies turn into adults who wish they could get life insurance. I am the breadwinner at the moment in my family. My husband has great earning potential but for now he is a post doc. With a baby on the way, if I was to die tomorrow I'd sure wish I was leaving a little $ behind for my boys to carry on with their way of life uninterrupted. Of course, they'd have my sizeable 401K but none of that is designated to my son as would be with life insurance.
One of my only regrets of my parents care of me is that they didn't get life insurance on me before my diagnosis. I was sick for 2.5 years....plenty of time to get it lined up. Oh well. I did manage to get Aflac to give me short term disability which I'm about to collect on with my maternity leave so maybe I can still find a co. to offer me life insurance. Who knows? Bottom line, I think it's a good idea to get life insurance for your little one's. I'll definitely be getting my son a policy before he gets any cf testing.