"Figure 4: Women having multiple births by age of mother, 1976, 2014 and 2015","" "England and Wales","" "","" "Notes","1. Multiple births arising from a single pregnancy are counted as one maternity. The number of maternities indicates the number of women having babies (including stillbirths) rather than the number of babies born." "Unit","Maternities with multiple births per 1,000 total maternities" "","" "","1976","2014","2015" "All ages","9.6","16.0","16.1" "Under 20","6.2","7.0","6.1" "20 to 24","7.7","9.6","9.4" "25 to 29","10.5","12.9","13.3" "30 to 34","12.4","17.3","17.3" "35 to 39","13.4","22.8","22.5" "40 to 44","11.2","29.4","27.9" "45 and over","9.8","105.5","102.4"