We found out at 12 1/2 weeks that we were having mono di twins. I've been reading up a lot on it, and trying to gauge how concerned I should be about the prenatal care I've been receiving and if I should find a high risk ob. I went back at 16 weeks and they were only going to do Doppler check but had to pull out the ultrasound because the babies were so close together it was hard to determine the separate heartbeats. Everything checked out fine, but they have not done any measurements since 12 weeks. I'm 18 weeks now, and going in for anatomy scan next week, but the last time I spoke to doc- they were only going to see me every 4 weeks... Advice from other mono/di twin moms??