I believe Ambry and Quest can do a multi-level test where they start with a simpler test and head up to the more extensive test only if they don't find something in the cheaper method first. The very last step in this multi-level approach is deletion testing which is something most of us have not had done because 2 cf genes were found first. Sounds like a good idea. I hope you don't have it but if you do...you'll be like me with cf and a son with cf. I'm here for you if you need support. As momma you've got to stay healthy so better go get tested. Having the appropriate care could put years on your life!