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If accuracy of scans r supposed to be excellent in 1st trimester, particularly at 8-10 weeks gestation, then why is there an error margin of +/- 7dys?

1 doctor weighed in
Dr. Jeff Livingston
Obstetrics & Gynecology

In brief: Math

There is a margin of error in everything is life.
In sonography the margin exists because of the mathematics involved in measuring a fetus and then applying those measurement to standardized algorithms that establish the gestational age. The further along the wider the margin or error as one fetus begins to individualize.

In brief: Math

There is a margin of error in everything is life.
In sonography the margin exists because of the mathematics involved in measuring a fetus and then applying those measurement to standardized algorithms that establish the gestational age. The further along the wider the margin or error as one fetus begins to individualize.
Dr. Jeff Livingston
Dr. Jeff Livingston
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