hi libby,
camden will do the test only if u have reached 14th weeks, i am 14 weeks 1 day. for KKH and TMC, they do at week 11 to 13, as that is the window period for nuchal scan.
i am not sure how soon the scan results at KKH take, but at Camden, you know immediate the results during the scan as the doctor will give his review as he scans and that gives you the assurance.
today, the doctor showed that i had another sac, and that concluded i could be carrying twins initially, but lost it through bleeding during week 5. the thing is, at KKH, after so many scan visits, i was not told of the other sac...