We were all excited today because we got to go to a perinatologist (a maternal fetal medicine specialist) to do our "big" 20 week ultrasound and hopefully get some good shots of both babies and find out the genders but it didn't go quite as expected.
First the nurse came in and did the usual blood pressure check and it was 160-something/80 which is really high so she had me lay on my left side. Immediately it went down to 116! It's amazing what a little rest can actually do.
Then the tech Krista came in to do the scan. I'm glad they warm up the ultrasound goo first because she put a LOT on! Krista confirmed that these babies were monochorianic/diamniotic (mono-di) which means that they share the same outer sac and placenta but have separate inner sacs thus making them identical. It was nice to have someone actually confirm it for us as our regular OB and ultrasound techs never wanted to commit to fraternal or identical.
Krista took a look at the placenta and said that I still have a partial previa (which means that the placenta partially covers the cervix) so that is actually good news because 2 weeks ago I had a complete previa. If this keeps up it will hopefully go away entirely and I won't have to have a c-section!
We started with Baby A and went through all the measurements and everything looked great. The fluid levels were looking good, we saw the baby waving and moving around a bit so that was fun. She finally got to the "crotch shot" and just as I suspected, GIRL!! Poor Ben is going to be outnumbered because if this one is a girl, it means the other one is a girl as well.
Moving onto Baby B - same thing. She did the measurements and everything was looking great. We got a cool photo of both of their heads together. Krista said that they were spooning the whole ultrasound so they're close already. Again, to the crotch shot and of course, it's a girl. Hey, at least we have all of Maia's old clothes and stuff, right?
So Krista told us that Baby A was 7 oz (202g) and Baby B was 10 oz (283g). That didn't really concern us because Baby A had always been a little bit smaller than B. Krista left to go get the perinatologist (Dr. Wothe) to talk to us about our situation so Ben and I were just chatting about what it would mean to have 3 girls when he comes in looking serious.
Apparently, this size discrepency is a problem, and a big one. He said that Baby A has Selective Interuterine Growth Restriction and low end-diastolic flow which means that the amount of nutrients and blood she's getting from the placenta isn't enough. The doctor told us that at this point, he would only give Baby A a 50% chance of survival. He said in cases of single pregnancies with this happening, the survival rate would only be about 5% but because she's a twin she has a better chance.
Of course Ben and I asked what we could do and the doctor gave us a few options. He said that we could do an amniocentesis which would mean inserting a needle through my stomach into the fluid of Baby A to draw some out and check for chromosomal issues. The doctor didn't think this was really necessary since they don't see any indication of problems on the ultrasound and I did my quad screen which came back normal. He also suggested cord ligation which is separating the cord of Baby A from the placenta and letting Baby A pass away while giving her sister a better chance of survival. This is not an option for us, especially with the 50% survival rate we were given and the fact that she looks perfect, just small.
The risk lies with the possibility of Baby A dying inutero because of her small size. If this happens, there is a chance that Baby B would be adversly affected. Because of the blood vessels that link the twin's circulatory system together, death of one twin may result in severe drop in blood pressure of the other twin and subsequent brain damage (up to 30%) or death (up to 40%). This complication results from the hemorrhage of blood from the appropriately grown twin into the demised SIUGR twin.
The doctor told us now that all we can do is wait and see. He scheduled another ultrasound for us in 3 weeks (February 6th) to check on the growth. No matter what it sounds like we'll be delivering these babies early so that's not something we were really prepared for. Once they reach viability (at least 500g and 24 weeks) they will start monitoring me more closely to determine how Baby A is doing. If Baby A starts to decline, they'll consider their options and deliver early to give her a better chance of survival. In the meantime, we have a home doppler so we can check the heartbeats at home to reassure us that Baby A is still alive so that helps a little with the waiting but it's still tough to feel like there's nothing I can do. Dr. Wothe said that I could go on bedrest if I wanted but he didn't see that it would actually help. I told him I have a desk job and he said that sounded perfect. I should just be taking it easy and eating a lot of protein so that's what I'm going to do.
Please pray for us. All we can do is wait, but we can also wait and pray, right??