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目的:探讨不同孕龄正常新生儿出生体重经验百分位数,建立新生儿出生体重修匀曲线及百分位数值,获得不同孕龄正常新生儿出生体重标准以及不同孕龄男、女新生儿出生体重标准。方法:回顾分析1999年1月1日~2008年12月31日在我院产科住院分娩,母亲无并发症且新生儿存活无畸形的15830例的出生体重。以4次方方程y=a+bx+cx2+dx3+ex4分别修匀新生儿实际出生体重及男婴、女婴10th、25th、50th、75th、90th百分位数曲线,分别计算修匀后出生体重。结果:(1)获得我院正常妊娠28~42周单胎活产新生儿出生体重10th、25th、50th、75th、90th经验百分位数与修匀后百分位数;(2)我院10年间单胎活产中小于孕龄儿和大于孕龄儿的总体发生率分别为10.16%和10.29%;(3)在我院出生的新生儿中男婴的平均出生体重较女婴高104g。结论:(1)我院正常妊娠28~42周单胎活产新生儿出生体重修匀曲线为监测评估胎儿生长发育和围产儿结局提供了重要正常参考值;(2)我院小于孕龄儿与大于孕龄儿发生率与国外报道近似;(3)男婴平均出生体重大于女婴。
Aims: To investigate the birth weight percentile of normal newborns at different gestational ages, to establish newborn birth weight curve and percentile value, and to obtain the birth weight of normal newborns at different gestational ages and the male and female newborns Birth weight standards. Methods: A retrospective analysis of January 1, 1999 ~ December 31, 2008 in our hospital obstetrics and gynecology hospital delivery, mothers without complications and neonatal survival without deformity of the birth weight of 15,830 cases. The actual birth weight and the 10th, 25th, 50th, 75th and 90th percentile curves of the newborn were smoothed with the fourth-order equation y = a + bx + cx2 + dx3 + ex4, Birth weight. Results: (1) We obtained the 10th, 25th, 50th, 75th, 90th percentile and the 90th percentile of the birth weight of newborns with single child birth from 28 to 42 weeks of normal pregnancy in our hospital. (2) The overall incidence of single live birth in 10 years was less than gestational age and gestational age were 10.16% and 10.29% respectively; (3) In our hospital, the average birth weight of newborn infants was 104g . Conclusion: (1) The curve of birth weight of singleton live births in normal pregnancy from 28 to 42 weeks of pregnancy provides an important normal reference value for monitoring and evaluating fetal growth and development and perinatal outcome. (2) With the incidence of more than gestational age similar to foreign reports; (3) the average birth weight of baby boys than girls.