thread: Baby weight accuracy?

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  1. #1
    Registered User

    Jul 2007
    98

    No they aren't all that accurate....

  2. #2
    Registered User

    Nov 2006
    south brisbane
    234

    i doubt it they told my sil that she would have an 8 pounder but he was 6 pounds way off...

  3. #3
    Registered User

    Nov 2004
    Melbourne VIC
    1,733

    At 36wks, I was told he would be 7lb8 and he was 7lb 9, so in my case they were spot on which was a surprise!

  4. #4
    Registered User

    Dec 2004
    Sydney
    1,444

    With DD#1 my obs felt my tummy and gave me an estimate and said that she would make it just under 4kg. She was born 3915g. So he was correct. Although he went by feel, not scan.

    Regarding your scan, at 29weeks DD#1 was estimated to weigh 1.7kg so you may or you may not have a larger bub.

  5. #5
    Registered User

    Oct 2008
    312

    Jordie, I had a growth estimate scan at 28 weeks too - they said bubs was around 1.5kg, my DS was born at 36wks and weighted 1.6kg so I am happy that this one isnt going to be small.

    My OB wants me to have another scan at 34 wks to see if I am having a big bubs. I am going to try for a VBAC so OB a bit worried about big bub with scar etc. My family history is for babies at least 8.5 lb - my sisters biggest was 12lb 8oz!

    I am not keen on another scan as I dont think they are very accurate and I am confidant about birthing a big baby. I have heard that being 10% off either way is about normal for the scans.

    Is your OB wanting another scan or are you just wondering about eventual sizes?

  6. #6
    Registered User

    Dec 2005
    In Bankworld with Barbara
    14,222

    Don't think any more about it until the baby is on the scales. Seriously, growth scans mean very very little.

  7. #7
    Registered User
    Follow Early Kids On Twitter

    Oct 2007
    Eastern Wheatbelt WA
    3,282

    Double post, I'm sorry!

  8. #8
    Registered User
    Follow Early Kids On Twitter

    Oct 2007
    Eastern Wheatbelt WA
    3,282

    As others have said they aren't very accurate... it's just an guesstimate.

    However...
    Brendan was 1109 grams at 28+1 weeks, he was born exactly 2 weeks later, 30+1, and weighed 1545grams.
    Tristan was 1702grams at 28+3 weeks, he was born at 34+3 and 3090 grams.

    So yes it is possible bubs will be big, but the growth could also slow towards the end of the pregnancy. There is no way to accurately tell.

    Bubs is doing really well by the sound of things