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Re: FW: Need info on measurements....

From: Christopher (anonymous@obgyn.net)
Wed, 14 Jul 1999 11:44:12 -0400

>Hi Cindy,
>
>This is interesting, and thanks for sharing. I hope someone else who
>understands this better than I could share with us what it really means.
>For what its worth, here is my interpretation of it:
>
>At Tue, 13 Jul 1999, Cindy wrote:
>
>>I was just looking over my last level !! US and there is one measurement
>>that is starred. Here is what it says: Biparietal diameter is 6.2 cm and
>>95% at 23 weeks.
>
>Hmm... Biparietal, I'm *guessing* this is a cross-the-head measurement,
>which measured 6.2 cm long, and is 95% of "normal" (or shall I say
>"percentile" just as babies are usually placed in these percentiles,
>meaning the "average" baby would be at 100%, being average, and a
>slightly smaller baby would be less than 100%, and a slightly larger
>baby would measure at close to or more than 100%,

Percentile works this way. The average fetus/baby/child is in the 50%ile-half the population is higher and half is lower.The higher the percentile the larger the measurement in comparison to the average and the smaller the percentile the smaller the measurement in comparison to the average. Being in the 95% means that that measurement is larger then 95% of other babies at that gestation.

For example: my daughter was 13#10oz at her 8 weeks visit which puts her in the 95th %ile. So say there were 100 8 week olds in a room, Grace would have been bigger then 95 of them....in a statistically perfect world:)

Ask your doctor if you are concerned. Chances are that if there was anything to really worry about he/she would have said something already. PLEASE REMEMBER: ultrasound is NOT an exact science-accuracy of measurements depends upon the skill of the sonographer and the cooperation of the baby. Bring the paper with you to your next appt and ASK!! that is what you are paying them the big bucks for:)

Karen-Mom to: Katie (6/3/93) Jack (9/30/94) Ian (12/19/96) Grace (3/26/99)



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