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A member asked:
Can a 12 half week ultrasound be mistaken for a 8 half week baby scan ?
5 doctors weighed in across 3 answers
Usually not: At 8-12 weeks it is very accurate for dating plus minus a few days. It cannot be off by a month.
Answered 7/31/2013
5.1k views
Possibly: This is very early to detect lack of fetal growth. Check with your obstetrician and have another ultrasound to check for growth in 2 weeks. This really needs to be checked and other tests including an amnioncentesis may be recommended to check for aneuploidy.
Answered 8/20/2013
5k views
No, if properly done: Properly performed and interpreted ultrasound examinations have a variability of 8% plus or minus the measured dating. Ultrasound dating at 12 weeks 3 days should have a 95% confidence range of 11 weeks 3 day to 13 weeks 3 days which is +/- 8%.
Answered 12/10/2013
5k views
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