I just found out Tuesday that I am having twins. I am currently 11 weeks 2 days. They said they aren't going to do another ultrasound till around 18 weeks. Is this normal or should I ask for another at my next appointment to make sure they are growing at the same rate? They also didn't tell me if they share the same placenta or not. They are in different sacs though. Ultrasound was at 10 +4 weeks Any advice would be greatly appreciated! Thank you!