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One twin is bigger then the other

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One twin is bigger then the other

Postby usmcwife14 » Wed Jul 15, 2009 6:37 pm

Since I started getting my u/s baby B has always been a few days behind baby A, by 4 days. They both have good heartbeats baby A: 172 baby B: 159.And in recent weeks baby B has definetly been catching up. Should I be concerned about baby B being smaller? Has anyone ever had a twin a little behind?
Me(25)DH(25)
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Surprise baby girl December 2010!!!!!
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Postby cymplicity27 » Wed Jul 15, 2009 7:31 pm

My twins have always been different sizes. The girl is always a few days behind and the boy a few days a head. I think it's pretty common and you shouldn't be worried :wink:
Cynthia - 31, blocked tubes, DH - 26, perfect
1st IVF - 3/2009, ER - 3/26, ET - 3/29 BFP!!

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Postby aims327 » Wed Jul 15, 2009 10:32 pm

Like cymplicity said, it's normal. I just had my 19 week u/s and Baby A is right on schedule and Baby B is a week behind. Both babies are healthy.
Me 33 DH 41
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Postby usmcwife14 » Thu Jul 16, 2009 3:30 am

Thank you this makes me feel much better :D
Me(25)DH(25)
Male Factor
1st Ivf~ 1st beta 10dp5dt: 586 BFP!!!!
2nd beta 16dp5dt: 3527
TWINS!!!!
Boy/Girl Twins January 2010
Surprise baby girl December 2010!!!!!
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Postby MedStudentMom2B » Mon Jul 20, 2009 11:13 pm

Are you guys going by the U/S dates or by when your transfer was? My babies on U/S are approx 4 days behind my transfer date. I think this is normal but I dont want them to get too far behind.

Thanks!
Me: 28 DH: 37
IVF/ICSI#1: BFP!! 10dp5dt:168 15dp5dt:1134
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Postby cymplicity27 » Tue Jul 21, 2009 12:22 pm

MedStudentMom, I'm going off of measurements the u/s tech gets at every u/s I've had (which has been many since I'm high risk). From reports I've seen they've compared it to my original due date which uses my transfer date. For instance my due date is Dec 17th and the girl measured for due date of Dec 19th, the Boy Dec 14th. Specifically at my last u/s the girl was 6 oz and the boy 7 oz. It has been pretty consistent all along and the girl hasn't been falling any further behind. I think as long as they stay within a week or so within your due date they consider you on schedule.
Cynthia - 31, blocked tubes, DH - 26, perfect
1st IVF - 3/2009, ER - 3/26, ET - 3/29 BFP!!

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Postby Warren Dew » Sat Jul 25, 2009 8:03 pm

As long as the smaller one is catching up, or at least not falling further behind, you're fine.

If they get too far apart, the smaller one may resorb - disappear - as happened with us on both our successful cycles. It sounds like that's not what's happening to you, though.
TTC 2004
2005-2006 - clomid, IUI
mid 2006 - endometriomectomy
Dec 2006 - IVF #1 - negative
Mar 2007 - IVF #2 - chemical
Jun 2007 - IVF #3 - nothing to transfer
Sep 2007 - IVF #4 - healthy baby girl!
Apr 2009 - IVF #5 - healthy baby boy!
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Postby beachbaby » Sun Jul 26, 2009 8:32 pm

Hi, I was slightly different as mine always measured similar in size, until about 32 weeks when they started measuring abdominal circumference as well. Suddenly they were very concerned with twin 1 being very small for age, monitoring continued and he was still small. I eventually had the babies at 38 weeks 2 days and twin 1 was 13oz lighter than twin 2 but only 1/2cm shorter. Now at a year old there is 3lb difference in them, but nothing wrong both perfectly healthy 1 year olds, walking everywhere.
I always say one takes after my family (small), one after DH's family (big). We are not all the same if the babies are non identical they will probably be a difference in size. relax and enjoy your pregnancy, it flies.
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Me 39, DH 40. TTC 5years
4th times a charm,1-IVF, 3xFET's, 2 chemical
Twin boys born 9/7/08
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