But more and more women are working faster. Later preterm rates are on the rise for quite some time. "The late preterm singleton rate rose at an average annual

But more and more women are working faster. Later preterm rates are on the rise for quite some time. "The late preterm singleton rate rose at an average annual rate of 2% each year from 2014 to 2019 (from 5.67% to 6.32%). The decline in the late preterm rate between 2019 and 2020 (6.32% to 6.30%) was not significant." https://www.cdc.gov/nchs/data/databriefs/db430.pdf https://www.cdc.gov/nchs/data/databriefs/db430.pdf