The lady that did my scan at 19wks said she is 100% positive it is a girl. Just in case though we have been leaving tags attatched and keeping dockets for all the pink stuff we have bought. And we have picked girl and boy names. Can't be too prepared. It would be a bit bummer if they were wrong though. After thinking for 9 months it was a girl then finding out otherwise. Oh well, we'll soon find out!