Measuring ahead

Beatriz • 👼🏽👼🏽🌈

So I go get ultrasounds every week due to reoccurring miscarriages I’ve had previously. I went last week and I was measuring 9 weeks 4 days and went this week and baby was measuring 11 weeks. I’m not complaining in fact my doctor said everything looked great and the heart beat was 178 so it was good. I’m just curious as to where the 10th week went?! Has anyone else had this happen?