I have started wondering though, is it better to know or not to know? I don't want to spend months worrying *sighs*.
Cass, I think that depends on what you intend to do if you discovered there was a problem (ie. Down Syndrome). If you would continue the preganancy regardless, then it may not really matter if you don't find out until your 18 week scan. However, if you were to consider the option of terminating the pregancy, then of course, the earlier you know the better IMO. HTH's somewhat.