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A member asked:

As the margin of error for a scan that indicates a ga of 7w3d is typically +/- 5 days, is it possible for the estimated ga to actually be 6 days off?

A doctor has provided 1 answer

Yes, of course: In real life, 5 days and 6 days are essentially the same thing. Real life is never exact, so pregnancy-related dates are just estimates.

Answered 4/7/2014

4.2k views

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Related Questions

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I notice on my ultrasound scan at the top, it say "ga(lmp)=06w6d" what does that mean? Is that a measurement of the baby determined by the ultrasound?

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On TVs scan when pulsations can seen? my CRL is 3.4 mm n GA is 6weeks1day bt no heart beat m my UPT came Positve on25 jan n ihave pcod

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A member asked:

When you subtract 2 weeks from the ga provided by an ultrasound, does that give you the estimated fertilisation age or the estimated fetal age?

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Anomaly scan of 24 weeks GA result What does this mean? Is this normal? POSTERIOR, GRADE I PLACENTA, COVERING THE OS WITH ANTERIOR OVERLAP OF 1.93 CM, WITH VISUALIZATION OF SUBPLACENTAL SONOLUCENCY?

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A member asked:

My son has de novo 0.20Mb 6q21 duplication. I drank 34 US standard drinks 4 days before estimated conception date from 11 week dating scan, which is within the +/- 7 day margin of error for dating scan. Is it possible the alcohol caused this?

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OB/GYN 32 weeks 5 days scan, foetus GA is as follows; BPD: 82.6 mm GA: 33W 2d HC: 278.6 mm GA: 30w3d AC: 263.1mm GA: 30w 3d FL: 65.0mm GA: 33w 4d Gest. Age: 32w 0d EFW: 1807 g Does my baby have a small head? Could this indicate Microcephaly?
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