Confirmed g/b 12 week ultrasounds?

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Confirmed male or female 12 week ultrasounds, please may I see them? I'm wondering if there's much of a difference between the genders at 12 weeks :) (doesn't have to be 12 weeks, whatever week you were at the first dating scan) 
Also wonna see if your baby's nub was correct for the gender at that time :) 
Thanks :)