Your access to the NCBI website at gov has been temporarily blocked due to a possible misuse/abuse situation involving your site.This is not an indication of a security issue such as a virus or attack.You will require more frequent ultrasound scans during a multiple pregnancy, and although the same range of screening and diagnostic tests are available, they have different considerations when applied to more than one baby!
It is very important not to miss these appointments.
A first trimester scan is an important assessment tool when you are expecting twins, because this can be the easiest time to identify exactly what type of multiples you are carrying, and how their amniotic membranes are set up (chorionicity), since this can have major consequences later in pregnancy.
After 12 weeks, the important things for a sonographer to look for include the number of placenta, the presence and thickness of the membrane, and differences in growth between the babies.
I went in to see if I had an ectopic pregnancy because of side pain and come to find out there wee 2 sacs.
The heartbeats didn't show up until the following week!