congratulations Newmom yes I was in same situation at 5wks6days we only had one heartbeat but both our little guys were IVF so in theory the same age - we only had one heartbeat but at 7wks 2days there were two - now 15 weeks old.

Hang in there and I that all goes okay for your little twins.Sometimes if you have ovulated twice and hence concieve twins one can be a day or so older - so thats why there may only be one heartbeat seen at the moment.