My husband and I just have our were expecting identical twins on an early dating scan. Friday our babies measured 7 wks 1 day and 7 wks 3 days. Both had strong heart beats at 156 and 154! After being over the initial shock I can't stop worrying about Vanishing twin syndrome! Anyone have any stats on how likely this is to occur after you've seen healthy heart beats! I know the greatest risk is between 6 and 12 wks but just hoping everything will turn out alright!