I had my 7 week ultrasound today (my first) and we had two sacs with two babies!! The doctor could only get a good view and heartbeat on one (the 7 week measurer) and told us the other was measuring at around 6 wks 4 days and she isn't sure if the smaller one will make it or not. We're doing another ultrasound in two weeks to see if it's growing or not. Anyone else have any insight on this or been through it before?