CRL at 10 weeks 3 days

I had a question regarding the CRL length. Last week my baby was 9wks 6 days and today after 7 days of scan, its showing 10wks 3 days.

Can someone please suggest if there’s anything I should be concerned about? The Doctor said its normal, but I am worried why after 7 days my baby is showing 4 days of growth. And CRL is 3.48 cm

Thanks

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