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Did my due date change?

My original due date is October 13th. All the measurements on my ultrasounds (at 12 weeks, 19 weeks) have matched up with my due date so far.
But today I had an ultrasound done and they told me my baby is growing a week ahead. So I’ve been told I’m 33 weeks, but they’re saying the baby growth measurements are showing 34 weeks.
Does this change my due date or conception date?
I’ve been having over concerns about who the father may be so it may just be my anxiety messing with me about the paternity. But I was just curious about the question.

Thank you.
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13167 tn?1327194124
It shouldn't change your due date or your conception date;  it only indicates the baby is bigger than average at 33 weeks.  Early ultrasounds tend to be very accurate;  later ultrasounds tend to be less accurate.  I think you can go with the due date and conception date at the 12 week ultrasound.  

Consider that healthy,  full term babies are born at 40 weeks between 6.5 pounds and 9.5 pounds - that allows for a LOT of growth diversity at the end of a pregnancy.  
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3 Comments
Okay thank you. According to my due date, when would you suggest my conceive date be? Or around?
That has already been calculated for you by several people in your previous thread.  Everyone counts the same, still putting your conception date around January 20.
I wasn’t sure because I tested positive for a pregnancy test on Feb 6. Didn’t know if that was too soon for Jan 20 conception date.
But thank you for clarifying.
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