"Figure 4: Preterm live births have remained relatively consistent over the decade","" "Percentage of live births classified as preterm occurring in England and Wales, 2010 to 2019","" "","" "Notes","1. Gestational age in completed weeks is recorded for all live births on the NHS Birth Notifications system. It is not available for live births from registration data. Gestational age is highly correlated with birthweight. 2. Percentages were calculated using a total that did not include live births where the gestational age was not stated or where the low gestational age was considered “not consistent” with birthweight. 3. For gestational age below 22 weeks, birthweight was checked and was considered ""inconsistent"" for values of 1,000 grams or more. " "Unit","%" "","" "year","Total preterm","Moderate preterm","Very Preterm","Extremely preterm" "2010","7.1","5.9","0.8","0.4" "2011","7.2","5.9","0.8","0.5" "2012","7.3","6.1","0.8","0.4" "2013","7.4","6.2","0.8","0.4" "2014","7.6","6.3","0.8","0.4" "2015","7.7","6.4","0.8","0.4" "2016","7.8","6.5","0.8","0.5" "2017","8.0","6.7","0.8","0.5" "2018","7.9","6.7","0.8","0.5" "2019","7.8","6.6","0.8","0.5"