Due date calculation question?

Discussion in 'Pregnancy - First Trimester' started by Kirstin, Apr 15, 2009.

  1. Kirstin

    Kirstin Well-Known Member

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    Just wondering, when doctors work out your due date do they take into account the length of your cycles or just use the start of the LMP? xx
     
    #1 Kirstin, Apr 15, 2009
  2. polaris

    polaris Mother of two

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    They generally just use date of LMP. But your due date may be changed at your scan.
     
    #2 polaris, Apr 15, 2009
  3. Kirstin

    Kirstin Well-Known Member

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    That's what I was thinking, by LMP I am 3 days ahead but if they said that they must notice I am 3 days behind when it came to the scan? xx
     
    #3 Kirstin, Apr 15, 2009
  4. littlestar

    littlestar Proud Mum to a Little Boy

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    i could not use my LMP for my EDD as i found out i was PG at CD65 (3/3/09) due to irregular cycles i was only 3-4 weeks gone at that point.
    i had a scan on the 29th March which determined me at 7w+2 at that point. my LMP would have made me 13w+2.(based on the scan day)
    Huge Huge Difference!
     
    #4 littlestar, Apr 15, 2009
  5. polo_princess

    polo_princess ♥ Brookes Mummy ♥

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    Usually they doctors and mw's calculate your EDD based on the average 28 day cycle, they do take into account your cycle lengths but its hard to determine the exact date of ovulation.
     
    #5 polo_princess, Apr 15, 2009
  6. acowart

    acowart Its a BOY

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    i had my scan today and they measured from the head to the rump and that told the doctor how far along i was
     
    #6 acowart, Apr 15, 2009
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