Normal weights?

[WorriedMum]

Hi everyone, Jessie is 21+2 pg with Mo/Di Boys, Twin A weighs 328g and Twin B weighs 268g, the OB and Midwife both told her that she looks tiny for carrying twins and at 21weeks and there has been a constant 18% discordance between the boys at the last 2 ultrasounds, does this sound like a normal weight range? Jess is a little worried that a lady who is 2 weeks ahead of her carrying twins with their weights being in the 500g

[mummaof4]

whats mo/di??

i never took notice of weights during u/s as so many peoples scans have been way off the mark.

was their any concern from the dr??

[WorriedMum]

Hi Mummaof4
Mo/Di is Monochorionic / Diachorionic they share a placenta but are in seperate sacs, The only concern from the OB atm is that she has been suffering with shocking period like pain and backache and he thinks it may be the onset of preterm labour just was curious if the weight differences between a 21 week pg and a 23 week pg was normal (although whats normal)? we understand that every pg is different just she isnt very big at all having seen people around the same gestation as her she seems quite small in comparrison

[bgbgbb]

I dont remember my twins weights around this time (they were always a good size and very similar in weight, even for fraternals), and my belly was huge, although I'd gained very little weight. If you're concerned about your daughter's belly size, then don't be: I've seen friends at 23 weeks who are smaller than most mums of singletons, and some who look like they're carrying triplets.

But I would be concerned with the varying weights between the twins themselves. I believe you were trying to say that they are monochorionic, diamniotic, which means they share a placenta, but have different amniotic sacs? Twin to twin transfusion syndrome is a very real problem for mono twins, and easily explains why one is much larger than the other. This can be life threatening for both twins, so, without meaning to scare you, get her to see someone specialised in this area asap.

Best of luck.

[Nomsie]

Judging baby weights during pregnancy can be very hard. All the way through my pregnancy I was told my boys (also MO/DI) were exactly the same weight, and the greatest difference was but one gram.

Come their birth day, I had a 7lb 3oz-er and a 5lb 12oz-er... so I think it's fair to say that the weights are but estimates.

Also I didn't look like I was carrying twins. I must have held a lot of the bulk internally, because people were always shocked when I said I was having twins. People at my work always compared me to another pregnant woman with twins at a neighbouring school who they said was just huge. (her first pregnancy too)

Comparing belly sizes and estimated baby weights is like apples and oranges. (I mean, realistically we all know of women who have gone through at least half a pregnancy oblivious to the fact and they didn't show at all, right?)

As for TTTTS, whilst it is a risk, it is a minor risk for DI/MO twins. Those highest at risk would be MOMO, but the fact that your daughter's babies both have their own sac is a reassuring factor. And I dare say that if the hospital was concerned at all about this they would have her in for monitoring, and she would be assigned bed rest (most likely at the hospital) TTTTS is a serious condition and I've never known an OB to take the threat lightly. :)

Hopefully your daughter will be able to carry her boys for at least 4 months longer :) :fingerscrossed:

[sezzle]

Remember that the estimates of the size of the bubs on ultrasound can vary considerably from the actual size. I had one u/s at 24 weeks show 750 & 760g, then 4 days later 640 & 730g. They were born 2 weeks later at 780g and 852g.
And as for her size, at 21 weeks I was not recognizable as pregnant to strangers (even though my fundal height was 27 weeks) but had a massive growth spurt between 22 and 24 weeks and finally looked like I had a nice pregnant belly!! I usually wore size 10 so was quite small to begin with. Not sure where I hid them the first 20 weeks!