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Old January 29th 07, 10:24 PM posted to misc.kids.pregnancy
Anne Rogers
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Default Biparietal Diameter / 20 week scan


We have just had our 20 week scan and have been told the babys Biparietal
Diameter is below the normal scale at 39mm with head circumference at
158mm
and abdominal circumference at137mm (all just in scale) We have to go back
for another scan to keep an eye on the growth.


so you're saying the head circumference was normal? but not the diameter?
whilst the head is not a perfect sphere, the two are strongly related and
unless anything else has been said, I rather suspect there has been a
measurement error.

Anne