Fig. 1From: The association between temporal changes in the use of obstetrical intervention and small- for-gestational age live birthsTemporal trends in rates of labour induction and/or cesarean delivery, maternal smoking and small-for-gestational age (SGA) births (a) and temporal trends in rates of late preterm, early term, post-term and SGA births (b) among singleton live births in the United States, 1990 to 2010Back to article page