My appt is at 18wks and now I am wondering why the Dr. scheduled it so early. Will they even be able to see everything they need to see at that point? I guess if they can't they will just have me come back in, right? So I guess the good thing is I might get to see the baby more then 1x :-). Just curious if others had their A/S prior to 20wks and also if you did, were they able to see "everything" they needed to or did you have to go back?