Anyone else have an ultrasound measurement that was on the low side and everything turned out ok??

I did was measuring two weeks behind. My girl came two weeks early and was 7 lbs at birth

At 34weeks I measured 31weeks at 36weeks I measured 38weeks she weighted 7lbs 2oz at birth

my daughter was measuring 3 weeks behind the whole pregnancy & i ended up giving birth at 41wks & 4 days & she was 6lbs .9oz & now my son is behind 2 weeks but is healthy .