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  1. #1
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    Burakoam's Avatar
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    Are baby boys measured smaller or bigger in utero?

    Interesting Question that has been nagging at me... I am
    Not sure about my first two but I know my 3rd girl was always spot on for measurements. This baby sort of shocked me as being conceived on a Saturday when I had a super strong ovulation test at 12 AM on a wednsday..that's what my 6 week ultrasound claimed anyway. So back at 8 weeks and 4 days, then they say baby measures 8 weeks and 6 days... Meaning either the first measurement was off and baby really was conceived on Thursday OR baby is measuring a tiny bit bigger for its actual gestational age... Girl and boy moms..Whats your verdict? Was it different each pregnancy for you? We're your girls smaller or bigger? Boys smaller or bigger? Especially curious if you have at least one of each!

    My MIL says they told her my husband was going to be a small baby... Then he came at 37 weeks and was 10 pounds lol
    Katelynn Marie (2005)
    Cyra Elizabeth (2010)
    Angela Victoria (2015)
    Alexandria Grace (2017)

    My heart is full and my family is complete, even if i never got my son.

  2. #2
    Big Dreamer

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    I dont hold much accuracy with any of those scans. Most friends were told they were having huge babies & then they were born quite small.
    mummy to 10yrs & 8yrs. 7weeks dec 2016 4yrs.
    After 2 failed sways we are going high tech

    May 2019 IVF1 4 follicle, 4 fertilised & only 1 made it to day 5
    JUly 2019 IVF2 8 follicles, 3 fertilised & only 1 made it to day 6 frozen & waiting for us
    our precious was a failed FET .
    IVF3 1 day 5
    2020 COVID halts our plans & we cant travel
    2021 6 more egg collections yeild 17eggs in total. Frozen gametes shipped to clinic & 16 survive the thaw & only 3 fertilised. None to test on day 5

    Jan 2022 this wasnt the plan.......
    Feb 2022 stopped growing & left me at 8weeks

  3. #3
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    My boys measured a fews days ahead at both 7wk scans and NT scans.

    This one was 4 days behind the early scan and should have been 6+6 but was 6+2. It then was 3 days ahead at the NT scan. I don't know the gender yet so it doesn't help much!

    I would have thought boy babies were slightly bigger on average but I have no idea. I think it more comes down to the parents, mine are longer because DH and I are tall so our kids are tall etc.

    Sept 2008 Sept 2011 March 2017



  4. #4
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    The other thing with size is subsequent babies tend to be bigger. I was bigger than my older brother at birth but maybe if I was born first it would be different. (My younger sister was smaller but she was prem)

    Sept 2008 Sept 2011 March 2017



  5. #5
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    My boys measured ahead but my girls have too (and they are twins). Baby boys do tend to be bigger at birth but that would only be evident at much later scans (for growth). Good luck!!!

  6. #6
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    my 5 full term babies have ranged in weight from 5lbs to 7lbs with my smallest and biggest babies born 13 months apart, both born at 39 weeks and both boys but with a 2lb weight difference! my girl was my second biggest baby.

    during pregnancy i have always measured small, anywhere from 4-8 weeks behind, i was 5 weeks behind with my 5 pound boy and 8 weeks behind with my 7lb girl so for me its totally unreliable!!

    fingers crossed for you that youve got your little boy this time

  7. #7
    Big Dreamer

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    I should also mention that both of my boys were born exactly the same size, length & weight at the same 38+4. 3105g 50cm & 30cm head - so both on the small side. Truly amazing that they were both the same size!
    mummy to 10yrs & 8yrs. 7weeks dec 2016 4yrs.
    After 2 failed sways we are going high tech

    May 2019 IVF1 4 follicle, 4 fertilised & only 1 made it to day 5
    JUly 2019 IVF2 8 follicles, 3 fertilised & only 1 made it to day 6 frozen & waiting for us
    our precious was a failed FET .
    IVF3 1 day 5
    2020 COVID halts our plans & we cant travel
    2021 6 more egg collections yeild 17eggs in total. Frozen gametes shipped to clinic & 16 survive the thaw & only 3 fertilised. None to test on day 5

    Jan 2022 this wasnt the plan.......
    Feb 2022 stopped growing & left me at 8weeks

  8. #8
    Big Dreamer

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    I got a little bit obsessed with measurements during my pregnancy as a gender clue, but I don't know how accurate it is until the very end. I've only had boys, but depending on the scan and their individual growth spurts they were both usually a few days ahead in the first and second trimester and then maybe a week ahead in the third. I do believe boys tend to be a bit bigger in utero, but I have heard of more then a few bigger girls! Including me at over 8lb!
    2014 2016

  9. #9
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    All 3 of my boys measured ahead from the very first dating scan and all the way through.

    That being said, I have friends that have girls who measured ahead as well.

    FX for a blue bean!!




    DS1, DS2 , & DS3
    One last pink sway 2016
    My Ovulation Chart

  10. #10
    Dreamer

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    My boys all measure behind in the beginning and then normal until the end. With the exception of ds2 who measured very large, they induced me for size and he was 7lbs7oz so I put very little faith in the accuracy of ultrasounds. I will also mention my uterus is tilted which I believe is why I measure behind in the beginning

    Sent from my SM-N910V using Tapatalk

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