At two hospitals, the ultrasound results showed one as 5 weeks of pregnancy and the other as 6 weeks. How is this possible?

Patient's question:

Age
On November 14, I had an ultrasound at a hospital, and the doctor said "5 weeks pregnant." On December 12, I had another ultrasound at a different hospital, but they said it was only 6 weeks. Why is there such a big difference between the two hospitals? Neither ultrasound showed "fetal movement," is that normal?

Doctor's answer:

Hello, this should be due to the probe position during the first check, causing the overlap. As long as the follow-up review is fine, you don't need to be overly anxious. Pay attention to regular check-ups during pregnancy.
Hello, if you're not reassured, you can go to a formal Grade A hospital for examination. If there are no symptoms, it's recommended not to worry too much.