36 Weeks!!

I had my 36 week appointment today, if I make it one more week they will be full term! I can't believe we've made it this far! During the growth scan the sonographer found that the twins are now growing at very different rates and we're not sure why. They have been measuring within a few ounces of each other the whole pregnancy, and two weeks ago they both measured 5 pounds 3 ounces.  Today Liam only measured 5 pounds 12 ounces (only a gain of half a pound) and Lizzi is up to 6 pounds 11 ounces (gain for a pound and a half).  My Dr is on vacation so I had to see a different OB and he's not worried, but wants to play it safe.  I am going back in on Friday for a biophysical profile to make sure they aren't in distress.  With identical babies that share a placenta there is a condition called twin-to-twin transfusion syndrome (TTTS) that is very dangerous and can happen any time in the pregnancy.  This is where one baby receives more the of blood, oxygen, and nutrients than the other and causes the difference in growth.  They say this is not possible in fraternal twins since they do not share a placenta, but my twins have a fused placenta (meaning it started as two that have become one, and there isn't even a thin membrane seperating them).  There is also the possibility of an issue with Liam's cord or with just his placenta aging and no longer giving him enough nutrients.  With all this said, there is also the possibility that the sonogram was wrong (although the sonographer did repeat her measurements) or that they are just different kids and are growing differently.  If they do find a problem on Friday then at least both babies are a good size and there's little risk in delivering them at this point.  We are hoping for the best and will post on Friday as soon as we know the newest results.