hi karina,

lucy is right with the things she said, i would just add that some gp's dont let you get a scan early, only if your "high risk", most gp's like tthe first one at 12 weeks, thats the best time for a dating scan.

i had one early with this pregnancy around 5-6 weeks, then at 12 weeks, then at 20 weeks, as we were not sure of my dates, all the ultrasounds have come back different due dates, but they have taken the 12 week date.