wee sample should be first mornings. Doesnt need to be kept anywhere special, i just left mine on the bench for the day (wrapped).
19week scan, from my exp, prob dont need to ask much. They just go thru the measurements, heart, legs, arms, brain etc. I didnt ask many questions. Just if something came to mind while she was doing the scan, like at one stage, when checking the blood flow thru the heart, i asked if it picked up heart defects etc.
i was ment to have an appoint at 21weeks with my obs, and would go thru any issues that may have risen from the u/s. But, had to cancel , and will be having that appoint on Thur at 23weeks.