I had one done wen i was 15 weeks ... but its true u should wait longer so u have more to see..
You should do it but i was told not to do it until your like twenty six weeks
Its a different type of ultrasound to be able to see ur baby. there very interesting i would recommend getting one so u can see baby and see there face see who its gona look like its just something to do for the fun of seeing ur lil one