Trans Nuchal screening

Katrina
My last ultrasound was at 9 weeks 6 days, and I'm having my trans nuchal screening next week at 13 weeks :) anyone have any experience with one? I technically don't have any risk factors other than just not knowing my fathers history at all. Do they tell you at the ultrasound everything looks good? Do you take home pictures like a regular scan? 
And is it too early to see what gender at 13 weeks?