The path dude doesn't know what he is doing. 1st tri screening combines bloods & the NT scan. Blood can be taken between 9 weeks and 12 weeks 6 days (best taken at 10 weeks) and the NT scan done between 11 weeks 3 days and 13 weeks and 6 days. If you get the bloods done before the scan, then you are able to get your results soon after your scan because the bloods have already been processed.

2nd tri screening is blood test only. You can have either 1st or 2nd tri screening but not both.