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Q: Pregnancy due date histogram ( No Answer,   3 Comments )
Question  
Subject: Pregnancy due date histogram
Category: Health > Medicine
Asked by: curiosit-ga
List Price: $4.00
Posted: 05 May 2005 16:49 PDT
Expires: 04 Jun 2005 16:49 PDT
Question ID: 518265
How accurate is a typical due date for a pregnancy?  Specifically, where can
I find a fairly reliable histogram or graph of the probability
distribution of birth date as a function of predicted date of birth? 
I realize this might depend on the method of prediction and the date
on which it was performed.  I'm most interested in the data for
ultrasound during the first trimester, but I'd appreciate any graph
that gave me a real understanding of the variability of these dates.
Answer  
There is no answer at this time.

Comments  
Subject: Re: Pregnancy due date histogram
From: myoarin-ga on 05 May 2005 18:32 PDT
 
Hi, 
Maybe some of the comments to similar question would interest you:

http://answers.google.com/answers/threadview?id=515106
Subject: Re: Pregnancy due date histogram
From: xarqi-ga on 05 May 2005 23:51 PDT
 
How accurate?
Not very.

The standard deviation for normal human gestation period is about 15
days.  That means that about 1 in 3 babies will arrive either more
than 2 weeks "early", or 2 weeks "late".
Subject: Re: Pregnancy due date histogram
From: curiosit-ga on 06 May 2005 09:25 PDT
 
Thanks for the information--it's consistent with what I'd heard.  It
is surprising that a more detailed distribution isn't available
anywhere on the web since, as someone who commented on the above
thread mentioned, it would be very easy for a hospital to gather this
data.

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