Background
Fetal growth restriction(FGR) has two means,one is intrauterine growth retardation(IUGR),the other is low birth weight(LBW)of newborn. In China,the rate of low birth weight infant is about 4.75%~8.5%,LBW is one of important serious reasons to increase morbidity and mortality of babies in perinatal period.In 1995,one reporter of the United Nations indicated that adults with cardiovascular disease and blood-stroke were LBWI at least 10%,those sickers with high blood pressure(HBP) were a...