it usually takes about an hour, they fill in all details about your medical history, do your height and weight to work out your bmi, take your blood pressure and do a full blood test to check if you are immune to some things (sorry can't remember what!), they give you your maternity notes to take away with you (amongst a load of other leaflets!!) they then organise your 12 week scan for you and you'll get a letter through the post with your scan date xx