Number of weeks on ultrasound scan printout

Hello mummies. At week 11, I go for a scan and the ultrasound scan printout shows I'm week 11. However, after 2 weeks I did a scan again and it shows week 12 but not 13. How to determine the number of weeks are correct? #puzzled

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they determine from the CRL when doing the ultrasound scan. I've seen people's EDD got adjusted between 5 to 7 days after a few ultrasound scans along the way. as long as gynae says fetus is growing, I think all is well. don't worry too much.

Don’t worry too much about that, it fluctuates somehow as it’s afterall an estimate. As long as baby is showing a good growth progress you are on the right track 😊