Objective To evaluate the feasibility of screening SGA and LGA by applying the INTERGROWTH-21~(st),Project(2014) standard in China. Methods In accordance with standards of different gestational age newborns,published by Research Group(1986 to 1987) normal weight standard weight of 15 cities neonatal physical development and the INTERGROWTH-21~(st)Project(2014) of different age group of newborns,described this collection the 1 859 birth weight distribution. Screen SGA and LGA according to the Chinese and int...