12

thread: Baby size prediction at your scan?

  1. #1
    Registered User

    Feb 2009
    On the couch.
    832

    Baby size prediction at your scan?

    Just wondering, when you had your 20 week scan did the sonographer predict the weight of your Bub? And if you have had them already was it an accurate prediction? Ive been told to expect a 9lb Spawn if he comes on time so Im getting a bit worried.
    Thanks in advance

  2. #2
    Registered User

    Oct 2010
    Brisbane
    711

    No, but just bumping up..

  3. #3
    Registered User

    Dec 2007
    Sunny Qld
    14,682

    Errr not at 20 weeks no.....

  4. #4
    Registered User

    Feb 2009
    On the couch.
    832

    So maybe Im already imagining a torn vagina for nothing then? lol heres hoping...

  5. #5
    Registered User

    Jan 2010
    In Love land with my family :D
    1,512

    Um no, 20 weeks I personally think is way too early to determine the size of bubz!

    One of my friends who only has 5 weeks to go is FREAKING herself out because she thinks she's going to have a HUUUGE baby. The Dr said she can expect a baby between 7-9lb (ummm thats a HUUUUGE gap!!!) but she also thinks if she has a small baby it will be less painful .. I shouldnt laugh but she makes me laugh (we've known each other for almost 20 years so i CAN laugh at her!)

    I was told to expect a 8 1/2 pounder and she ended up being 9.1 I had an awesome 4 hr labour with my DD!

  6. #6

    Mar 2008
    Where dreams are now reality
    2,318

    My scans estimated bubs weight and size at each scan but not in advance. Scans can be out by 2lb as well, so I wouldnt go panicking just yet. A 9lb bubba also doesnt mean you are gonna be torn to no end, much smaller babies can do that and much larger ones may not. My DD was no where near 9lb and I had everytjing but a 4th degree tear. A huge variation of things cause tearing. Dont worry too much about it, hun

  7. #7
    Registered User

    Feb 2009
    Brisbane
    1,070

    I was told at my 20 week scan with DS1 that he was well above 'normal' 20 week size and he would be well over 10lb by 40 weeks. In the end he was 6lb 15oz at 38 weeks. I did have PE though, which probably reduced his growth towards the end. DS2 was big at his 20 weeks scan too, but was only 7lb 8oz at 40 weeks.
    I wouldn't worry at this point. My ob told me after I was told I would be having a giant baby that he hears that all the time and it is rarely the case. The estimates are based on length of bones at 20 weeks, so could just be saying you will have a really tall baby, not necessarily fat or with a giant head (the bit you really need to worry about ).

  8. #8
    Registered User

    Sep 2008
    Melbourne
    3,300

    No prediction of weight, but at my 20 week scan I was told that this ones head size was 95 percentile but not out of proportion with the rest of him, so guess that means is big all over. I am expecting a big bub with big head, based on DD and the fact DH and I both have big heads, and my fundal height measurements, but I want a big baby little ones scare me, and with the birth what will be will be am sure if he is in the right position all will be fine. Everything I have read suggests is position rather than size that has more impact (DD forehead posterior presentation leading to e-csection) and so a big baby in a good position can give a better outcome than a smaller baby in a bad position. I am sure I was also told that big heads can be a good thing, something to do with the pressure of the head on the cervix causing efficient dilation or something. I would also be very surprised if all babies grow at a uniform rate over the last 20 weeks (which they would need to give an accurate prediction of size) would think is like people varying rates of growth depending on genetics and other things.

  9. #9
    BellyBelly Member

    Sep 2010
    North West Victoria, Australia
    3,003

    I had constant monitoring of DD's size due to the fact that she was going to be delivered prematurely.
    She was measured at an estimated size of 2lb 10oz at 33+5weeks.
    She was born at 4 days later at 3lb 12oz.
    And she hadn't grown in 2 weeks, so they're not very accurate..

  10. #10
    Registered User

    Aug 2008
    Ouiinslano
    5,303

    Yes, baby was estimated to be about average size at 20 and 34 week scans. Nobody made any big deal about size or weight or anything, just that she was right on average.
    She was a 9 pounder (a couple of grams short, but close to 9lbs) and I had really minor tearing. There was debate as to whether it was first degree or grazing. So big doesn't mean tearing.

  11. #11
    Registered User

    Mar 2011
    Melbourne
    948

    with my daughter they told me at my 20 and 34 week scan she was going to be much bigger then my first (he was born 8.11lbs) but she came out 8.6lbs
    when i was in labour with my son they predicted he would be between 7-8lbs but he was a little bigger lol my OB was very shocked
    but this bubs is measuring smaller then my first 2 so ill be intertested to see how big he comes out his currently in the 14-20%weight/size range at my 32week U/S

  12. #12
    Registered User

    Jun 2010
    763

    Yep, with DS they predicted he would be huge... and he was a WHOPPER! Massive tearing too, sorry not much comfort! But, would i do it again, absolutely! Couldn't stop me A year down the track, would i even know i had torn, not at all...

    At the end of the day you have what you have and there isn't a lot that you can do to change it

  13. #13
    Registered User

    Dec 2007
    Victoria
    7,260

    No, never had anyone try and predict birth weight/size at any scan. For either baby. And I wouldn't pay any attention to it if they did, US is notoroiously inaccurate when it comes to gestamating weight. Plus, there are about 7 different planes they can take the baby's head size on, so you would need to know which they are using to guage head size.

    DD1 was an ECS, so can't help there, but she was deemed "right size for dates" throughout the pregnancy and was 8lbs5.
    DD2 was a VBAC, and I had 2nd degree tearing, due to the ventouse extraction. She was 7lbs7. I had no pain at all after with the tearing, it was internal, they stitched it and it was like it never happened. I was paranoid about it too, but I went to my 6 week check up and the GP checked the stitches/healing etc and her remarks were "Beautiful. If a vagina could ever be called beautiful, yours would be. They did a perfect job."
    Last edited by LimeSlice; May 14th, 2011 at 10:50 AM.

  14. #14
    Registered User

    Jun 2008
    Brisbane, QLD
    484

    I never had anyone try to predict weight etc, my last scan before birth was 20 weeks and they did tell me he was a big boy, more long than anything.. The midwives at all my check ups all said 'Er, he's not a small baby' and DS was born 8lbs 12oz at 39+4. No tearing at all, just a graze from him coming out with his fist against his face.. That didn't tickle though!! And I am not a large framed girl, was 54kgs at 167cms tall when I fell pregnant.. Best wishes, aside from everything, all we really all want is a healthy bub

  15. #15
    Registered User
    Add teresa on Facebook

    Mar 2009
    wagga wagga NSW
    1,489

    i had DS at 34 + 3 weeks. the day before i had him, i had a scan and they told me he was 3.5kg. he was born the next day at 2.71kg. its just a guide.

  16. #16
    Registered User

    Dec 2009
    SE Queensland
    467

    Nope definately not at 20 weeks.

    I had to have a scan after a fall at 35 weeks recently & they said at the time of the scan he was approx. 2.5kg or 6lbs.

    Friend of mine had herself all freaked out with her last bub coz they told her she was going to be BIG. Got induced 3 weeks early & found out she would've had a normal sized bub anyway.

    Sizing seems to be VERY subjective.

  17. #17
    Registered User

    Mar 2011
    QLD
    53

    Def not at 20 weeks, I was told he was measuring a coupe of days bigger.
    At full term I was still tiny, all my MW would say was 'he will be a good size', pffft she had no idea.

    Bub was 7 pound 4,born @ 40+3

  18. #18
    Registered User

    Jul 2006
    Melbourne
    4,895

    Not at 20 weeks, closer to my EDD I did & the OBS/GYNO predicted between 7.5 pounds and 8 pounds. DD was 7.5 pounds...

12