Re: 10w4days pregnant

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• In reply to: Carla: "10w4days pregnant"

The dates are based on a large number of women who had measurements obtained when they were at a known gestational age. This will vary in diferent ethnic groups. Also the 10 weeks 3 days should have "Plus or minus 5 days" tacked on to the end of it. So should the 9 weeks 6 days. THese are an average with a standard deviation on both sides. And that assumes that the measurement is ACCURATE. if it isn't then the error is even greater.

--
R.Daniel Braun, MD  FACOG   FOG
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• Next message: R. Daniel Braun, MD: "Re: how is hCG tested?"
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• In reply to: Carla: "10w4days pregnant"