Accuracy of early pregnancy dating scans

For most mums-to-be, the first scan will be a dating scan at between 10 weeks and 13 weeks plus six days of pregnancy.

However, the timing of your first scan will also depend on how your pregnancy is going, and where you live.

That's the job of your next routine scan at about 20 weeks, when more detail can be seen as your baby grows bigger.

Nuchal translucency can be measured from 11 weeks to 13 weeks plus six days, or when the head-to-bottom measurement (CRL) is 45mm to 84mm. Antenatal Screening for Down's syndrome, setting standards to improve women's health. Soc Sci Med 59(7): 1397-408 @poppypaul I have a similar case. The dr has told me to prepare for the worst just in case and was telling me things like it's not my fault and it happens to a lot of women.

This estimates the risk of Down syndrome and other chromosomal abnormalities. National Institute for Health and Clinical Excellence, clinical guideline 62. The doctor has asked to check for any bleeding and to stay positive. She was talking like that's what was definitely going to happen which has scared me and Iv been inconsolable!

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...

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