Aguideline of maternal weight gain to reduce incidence off low birth weight of infants

为了确定与最少产科并发症相关的适当产前体重增加范围，对733例单胎妊娠的健康妇女进行了回顾性队列研究。根据日本妇产科学会的定义，将孕妇按孕前体重指数（BMI）分组，包括瘦型（BMI<18.0）、中等体重（BMI<24.0）和超重型（BMI <24.0）。在每个妇女组中，根据第10、第25、第50、第75和第90百分位值对产前体重增加进行分组。在瘦女性中，小于胎龄儿（SFG）的风险与体重增加小于第75百分位数（12.6 kg）有关，足月妊娠（妊娠长度的第90个，287天）的风险与体重增加等于或大于第90百分位数（14.7 kg）有关。在中等妇女中，SFG和低出生体重（<2,500 g）婴儿的风险与体重增加小于第10百分位数（6 kg）有关，而延长分娩风险与体重增加等于或大于第90百分位数（14.0 kg）有关。在超重妇女中，大于胎龄儿（LGA）的风险与体重增加等于或大于第50百分位数（7.1 kg）有关。因此，最佳的产前体重增加是：瘦型妇女12.6公斤和<14.7公斤，中等体重妇女6.0公斤和<14.0公斤，超重妇女<7.1公斤。

To identify appropriate prenatal weight gain ranges associated with least obstetric complications, a retrospective cohort study was conducted with 733 healthy women with a singleton pregnancy. Pregnant women were' grouped by pre-pregnant body mass index (BMI) according to the definitions of Japan Society of Obstetrics and Gynecology, lean (BMI<18.0), medium (18≦BMI<24.0), and overweighed women (BMI≦24.0). In each women group, total prenatal weight gain was grouped according to 10th, 25th, 50th, 75th, and 90th percentile values. In lean women, small for gestational age(SFG)infants risk was related to weight gain less than 75th percentile (12.6 kg) and post-term pregnancy (≧90th of gestational length, 287days)risk was related to weight gain equal or more than 90th percentile (14.7kg). In medium women, SFG and low birth weight (<2,500g)infants risk was related to weight gain less than 10th percentile (6 kg) and prolonged labor risk was related to weight gain equal or more than 90th percentile (14.0kg). In overweighed women, large for gestational age (LGA)infants risk was related to weight gain equal or more than 50th percentile (7.1 kg). In conclusions, optimal prenatal weight gains are 12.6≦and <14.7 kg for lean, 6.0≦and <14.0 kg for medium, and <7.1kg for overweighed women.