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Ultrasound due date

If you are given a due date based on ultrasound and not LMP, do they still add in that extra two weeks?

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Anonymous

Asked by Anonymous at 8:58 AM on Mar. 28, 2009 in Pregnancy

Answers (9)
  • If your ultrasound says two week less than what you originally thought, yes they will add two weeks..
    Anonymous

    Answer by Anonymous at 9:04 AM on Mar. 28, 2009

  • not sure what you are asking. The due date is the due date.
    Anonymous

    Answer by Anonymous at 9:09 AM on Mar. 28, 2009

  • I mean the two weeks they add like with your LMP.
    Anonymous

    Answer by Anonymous at 9:10 AM on Mar. 28, 2009

  • should your due date ever be considered 40 weeks from conception? or is it always calculated as 38 weeks from conception by ultrasound?
    Anonymous

    Answer by Anonymous at 9:12 AM on Mar. 28, 2009

  • NO! The due date from the ultrasound is based on the size and development of the baby why would you need to add 2 weeks. That being said if you have regular periods I would question the ultrasound due date if it is significantly different then based on LMP You are pregnant on average 38 weeks from the time of conception which is, on average, 40 weeks from your LMP. Both my kids came early by 10 and 5 days though.
    aeneva

    Answer by aeneva at 9:19 AM on Mar. 28, 2009

  • The average pregnancy lasts 41 weeks, so due dates are really just a number that is relied on way too much!
    Anonymous

    Answer by Anonymous at 9:54 AM on Mar. 28, 2009

  • "due dates are really just a number that is relied on way too much!"

    What she said.
    Christina807

    Answer by Christina807 at 10:20 AM on Mar. 28, 2009

  • If you get an ultrasound early, meaning in the first trimester, that date tends to be more correct then the date based on your LMP... It is based off development and growth so whatever that says, is correct.

    The baby will come when he's ready though. Due dates aren't expiration dates, only guesses. Pregnancy is 37-42 weeks long so you can go to 42, even longer, because your due date was wrong and/or baby was just not ready!
    celticreverie

    Answer by celticreverie at 11:01 AM on Mar. 28, 2009

  • It is not really possible to conclude the exact date of CONCEPTION by either method....and the actual date the baby will be born will be a mystery until it actually happens as well. That is just how it is!
    BJoan

    Answer by BJoan at 12:21 PM on Mar. 28, 2009

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