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  1. #1
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    Default concern that one twin bigger than other at 20wks

    Hi i am 20wks pregnant and at my first ultrasound it has been found that one baby is quite smaller than the other. twin a is a boy who is 100gm bigger than twin b who is a girl. my dr has said that chances are that my little girl may not make it 'statistically'. she has all her parts and a good heart beat and i hav to hav regular check ups to see how she is growing. has anyone else gone through this, is it common and does the smaller one always stay small or does it catch up or is it not good. i am really concerned and shattered at this news?

  2. #2
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    Sorry to hear. How many days/weeks difference is that. My bubbies are 4 days apart in size and the sonographer told me it was really normal and not a huge difference at 20 weeks. Haven't seen the doc yet.

    I hope everything works out for the best
    DFME DS1 DD May 09 DS2 Jan 2011
    Our little family of FIVE!

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    hi shockinamillion, the boy is 290gms and measures at 18wks6dys and the little girl is 193gms and measures at 17wks3days. i hav gone through ivf so they were implanted at the same time. it is quite a differance the obstetrition said but i am hoping that it may be becos ones a girl and ones a boy? i just hope she keeps growing. any info is helpful, its quite daunting the thought of only having one when i am attachted to both of them already we hav also bought our cots and lots of things. anyway fingers crossed everything is fine.

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    Hi there and welcome to bubhub.

    I think it is irresponsible for your doctor to have told you that one of your twins may not make it because she is slightly smaller.

    I am 33 weeks and have had regular scans throughout my pregnancy. I can't remember exactly when but at some point a size difference became evident. This has never been expressed as a concern by the sonographer or my obstetrician. At the moment the little girl is measuring 2 weeks behind the boy and there is still no concern. In fact my ob said that this is normal in boy/girl twins.

    Unless your doctor can give you a very specific reason for the slight difference in size (ie something to do with the placenta or amniotic fluid) I wouldn't worry at all. That's my opinion anyway.

    Please also remember that the measurements are just estimates. They are not exact.

    Best of luck with the remainder of your pregnancy
    Last edited by alanasmum; 12-02-2009 at 06:23.
    Me (36)
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    DD (June 06)
    Twins DD and DS (March 09)


  5. #5
    Sheer Bliss's Avatar
    Sheer Bliss is offline new username time?? this is toooo friggin hard, and NOT Bliss!!!
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    the measurements are very rough...it only takes them to be out a few mm and that can mean a few days and make a big difference. Both my bubbas are on the smaller side (so were my first single pregnancies, so it's not a concern) and depending on if they use the head or body or leg measurement, they are all showing different dates anyway!! My bubbas tend to have small heads, but my little boy has rather long legs!

    If your twins are not sharing a placenta then TTTS is not the concern and as alanasmum said, unless there are obvious signs that there is something wrong with the placenta, i think the dr may be jumping the gun.

    I have been having sem-regular scans since the start to check my twins growth, it's nice to see them often, and it is good to note that sometimes one grows more than the other, and then they catch up in the next few weeks.

    In Fraternal pregnancies, you need to remember that they are just like 2 separate pregnancies and size wize might grow at different rates.

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    Hi twoforone,

    I can totally understand how you feel, at our 13 week NT Scan we were told that Twin A was measuring a week smaller for Twin B and that it was cause for concern. At that time and throughout the entirety of my pregnancy the sonographers/obs were unsure if I had one placenta or two so they couldn't rule out TTTS. To say I was worried is an understatement. We were booked in for a follow up scan at 16 weeks and recommended a place for our 20 week scan in Brisbane, as we would be up here at the time, where one of the obs specialises in twin pregnancy and TTTS. Luckily for us at 16 weeks Little Miss A had done some catching up to her sister. We still had regular scans every 3 weeks and my ob/hospital appts in between.

    Our girls were born in May, both healthy and weighing 3.06kg and 2.94kg (that's right Little Miss A overtook her sister!)

    Hopefully all will be ok for you and I agree with CharlisMum that Fraternal pregnancies are like 2 separate pregnancies.

    Leanne
    Me (32) DF (30)
    Samantha Ruby & Nicole Isabella 09/05/2008



  7. #7
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    hi everyone, thankyou for your replies. it is comforting to know your stories, and that babies are fine. i hav had problems with eating and dont hav much of an appetite so i hope that isnt anything to do with it too. but i will try to really look after myself and be positive. your advice is great and this site has already helped me heaps. i will keep you posted on how they grow.

    thankyou again from jen

  8. #8
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    SuperGranny is offline Worlds best grandma! Winner 2012 - Most Helpful Member
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    hi twoforone, I had undianogsed twins at 37 weeks. They shared the placenta, and one was 5lb7 the other 4lb7, (sorry cant tell you in grams) I think I was so much better off not knowing anything about there being two of them. Im sure I was saved alot of worry and concerns from all the well meaning technicians that are involved with scans. I know they mean well, and Im sure there is many benifits with all this information, but I wonder that it is not just overloading the poor mums. Take care, Marie.
    Marie ~ mum to four adults,
    DS 1 -34, DD 1 & 2 - 33, DS 2 -29
    grandma to 4 grandsons and two granddaughters
    GS 13 yrs, GS - 8 yrs, GS - 6 yrs, GS -2yrs , GD - 2yrs and brand new granddaughter.


  9. #9
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    As someone said fraternal twins can be different sizes. It's just genetics. Unless they give you a specific reason apart from one being smaller I wouldn't worry.

    My twin girls were IVF and one was always smaller than her twin. I can't remember the early numbers but when they were born DD2 was 48cm and 2.690kgs while DD3 was 50cm and 3.180kgs. Now there is about 5cm, 2kgs and at least 1 size (sometimes 2 sizes, depends on the clothes) between them! We think DD2 takes after my grandma who was only about 5ft while I wouldn't be surprised if DD3 ends up 6ft or more like my dad's side of the family.

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    Quote Originally Posted by twoforone View Post
    hi everyone, thankyou for your replies. it is comforting to know your stories, and that babies are fine. i hav had problems with eating and dont hav much of an appetite so i hope that isnt anything to do with it too. but i will try to really look after myself and be positive. your advice is great and this site has already helped me heaps. i will keep you posted on how they grow.

    thankyou again from jen
    Don't worry too much about what you are eating....starving woman in third world countries still have babies, they will take from you what they need. I have also had hyperemesis for the first part of my pregnancy, lost 8kg and was puking 10+ times a day. I am now 22weeks and only just now the weight I was when I fell pregnant....and my babies are growing just fine. Now that I do have my appetite back, i eat what i want, what I think i can keep down, not what I should, or is healthy - i belive in listening to your body, and doing what it needs - so again, hard as it is, try not to worry.


 

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