Sorry if this is a dim question but i have my 12 week scan in 12 days and i have been reading up about the combined test. I get that they measure the fluid behind the babys neck but when do they take the blood? I am not due to see the midwife again until 16 weeks.
I had mine taken after the scan. I just had to go from the ultrasound dept to another dept (can't remember it's name) staffed by midwives. Different hosps will no doubt do it differently but it should be done in conjunction with your scan.
I just had the blood taking form the midwife had given me at 8 weeks signed off by the hospital at my 12 week scan and then was told to go to blood taking in the hospital but could be done when I wanted to do it, I just did it same day as the scan though.