My OB is amazing. I"ve had 3 m/c's and I'm over 40, so he scanned me at 6 weeks and then every week after until 13, then another at 16, 19, 20. I have another one at 24 weeks and then another at 28. The first ones were amazing bc I got to see the progession each week...from a blob with a heartbeat that got bigger and bigger and then suddenly it had arms and legs. so cool!
good luck with your scan.