I had my 20 week scan today and all looks fine and healthy with baby, sonographer said he was 90% sure its a girl but if we buy any girly things to keep the receipt "just in case" I know they can never be 100% sure of the sex but if we/others buy girly things then i would want to wash them before putting them on the baby anyway and would rather do this in preperation rather then wait til she's born just to make sure, also many places only have a 28 day return policy and if we get gifts we probably won't be given the receipts. I know 90% is very high but can imagine preparing for a girl and getting a boy!