"Figure 2: Infant and neonatal mortality rates for low birthweight babies: by age of mother, 2013","" "England and Wales","" "","" "Notes","1. Linked infant deaths (occurred in 2013) 2. Babies weighing less than 2,500 grams 3. Infant - deaths under 1 year 4. Neonatal - deaths under 28 days" "Unit","Rate per 1,000 live births" "","" "Age of mother at birth","Infant","Neonatal" "Under 20","44.8","34.8" "20–24","30.7","24.9" "25–29","30.7","25.0" "30–34","32.6","25.9" "35–39","33.9","24.3" "40 and over","28.9","25.7"