Do dating scans date from conception
Without an accurate due date, a blood test at what you thought was 13 weeks wouldn't be helpful if you were 16 weeks pregnant when the blood was taken. National Down's Syndrome Screening Programme for England. I went for a dating scan on Monday 7/9/15 and the Drs dates said I was 7 2 when they did the scan it measured to be 5 4 but it was in the right place.It may lead to you being given a high risk factor when your baby is actually developing normally (false positive result). Kettering: National Down's Syndrome Screening Programme Westfall RE, Benoit C. The rhetoric of "natural" in natural childbirth: childbearing women's perspectives on prolonged pregnancy and induction of labour. On the notes for the dr she put dates don't match not sure of viability of pregnancy...Nearly all scans after 10 weeks can be done through your tummy, and most units ask you to come with a full bladder.The sonographer will put some gel on your tummy and will move a small hand-held device (a transducer) over your skin to get views of your baby.This is because blood tests for Down syndrome are not very accurate if you are having more than one baby.Instead, you will be offered a nuchal translucency (NT) scan.
You may need a second scan to check the first scan's findings.
Your midwife may recommend an early scan at between six weeks and 10 weeks if you have experienced bleeding.
You may also be offered an early scan if you've had a previous miscarriage.
Looking for abnormalities isn't the purpose of this scan, though.
That's the job of your next routine scan at about 20 weeks, when more detail can be seen as your baby grows bigger.