Question on baby weights and 'percentiles'

mamabear7

I had my 26 growth scan yesterday and found out the estimated weights:

Baby A: 2lbs 4 oz and 76th percentile

Baby B: 2lbs 3 oz and 66th percentile

My first thought is great, they are big, measuring above average.  But then I was thinking, are those percentiles based off twin averages or is it the singleton average? 

In other good news, my cervix is holding strong at 3.7. 

justjo1975

Pretty sure that those are singleton averages, but I could be wrong.

google123

Those are good weights.  I think every clinic goes by their own database of weights, because my babies were 2 lbs 3 oz (and they said 71st percentile) and my boy was 1lb 15 and he was at (49th).  Are you exactly 26 weeks, a little behind or few days more?  I was technically 25w6d.

ade2be

I've wondered the same thing.  Mine were measuring 15oz just shy of 21 weeks which came out to be like the 80th percentile.  I think my OB is basing it on singleton weights.  Either way, the accuracy of the measurements is so inaccurate, that it probalby doesn't matter either way. 

YAY on the cervix!!

mamabear7

google123:

Those are good weights.  I think every clinic goes by their own database of weights, because my babies were 2 lbs 3 oz (and they said 71st percentile) and my boy was 1lb 15 and he was at (49th).  Are you exactly 26 weeks, a little behind or few days more?  I was technically 25w6d.

I was 26w1d when they did the u/s.  Very interesting how it all varies though. 

OrangeSmoke

Singletons.

I remember reading something about twins growing pretty much at the same rates as singletons until after 30 weeks (or something like that).