Hi - I have to go and have my serum test and nt ultrasound. i know they should be about 5 days apart especially as i want the blood test results before so they can look at them together. when is the earliest you should do each of these tests?i was thinking of doing the blood test at 10 weeks 5 day and the scan at 11 weeks 5 days or 11 weeks 6 days - do you think this is OK?