We had genetic sequencing done as well (Ambry in our case rather than Genzyme) and it took 4-5wks... very VERY long weeks. Hang in there... it is so hard waiting.
eta>
re. your question about what the test is looking for: there are two ways of genetically testing for CF; panel testing or genetic sequencing.
A <b>panel</b> test, widely available through many labs, looks for a bunch of pre-selected mutations. This would be the most common mutation- df508- and anywhere from 30-100ish others that they decide are 'common' although none of the others are found in more than 1-2% of those with CF, and most in much tinier proportions (think fractions of 1%.) Someone can have one of the other 1,600+ mutations not included on a panel but it would not show up. A panel can only 'find' what it is told to look for.
A <b>genetic sequencing</b> test (Ambry, Genzyme, and sort of Quest- their test only yields, to my knowledge about 1000 mutations) on the other hand, systematically examines the gene and identifies any mutation there- even if it's never before been seen. This is why doing this kind of test is important for someone suspected of having cf- a panel can only catch a handful of mutations. Genetic sequencing has identified well over 1,600 at this point. You can only find the vast majority of them with this kind of test.