dating scans - when best to have one?

[Glass half full]

Congratulations
I would also suggest waiting till you are 7 weeks. At the ultrasound clinic I used to work at so many patients had to come back for a repeat scan because they came to early to detect a heartbeat. The sonographers I worked with used to say at least 6 weeks, but better if you can wait till 7.
Good luck

[kristi14]

Congratulations I was pregnant with an april 11 baby so it brings back memories of me being as pregnant as you are this time last year nawwwwwwww.

7 wks is the best time to have a dating scan, i would go off your LMP dates and then add a week to be sure since your cycle has been so long