13+5

Also forgot to say that we got our NT combined scan and test results back in the post and the babies have a low risk of chromosomal abnormalities such as down's syndrome, so very good news! The results came back at much less chance than the average for my age etc which was 1:941. Fetus 1's risk is 1:13583 and Fetus 2's risk is 1:14200. Happy days.