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胎龄27~40周双胎新生儿宫内生长状况研究
Intrauterine growth status of twin neonates with a gestational age of 27-40 weeks
目的 制定双胎新生儿宫内生长曲线，研究双胎儿宫内生长状况。方法 采用横断面时间段整群取样实况调查方法，于2013年4月至2015年9月在深圳市两家医院完成了1 296例活产双胎新生儿体格生长现场测量，体重、身长、头围、胸围、顶臀长5项指标曲线拟合应用Lambda-Mu-Sigma（LMS）法。结果 获得了1 296例胎龄27~40周双胎新生儿出生体重、身长、头围、胸围、顶臀长5项指标宫内生长均值及其第3~97百分位曲线；该1 296例双胎新生儿出生体重、身长、头围、胸围、顶臀长5项曲线均低于既往报道的深圳单胎新生儿5项曲线；胎龄越小二者差异值越小，胎龄越大二者差异值越大。结论 该研究获得的深圳胎龄27~40周双胎新生儿体重、身长、头围、胸围、顶臀长宫内生长曲线可作为评估深圳当前人口群体双胎儿宫内生长状况的参考。
Objective To establish the intrauterine growth curve of twin neonates, and to investigate the intrauterine growth status of twin neonates. Methods Cross-sectional cluster sampling was performed for an on-the-spot investigation of 1 296 live twin neonates who were born in two hospitals in Shenzhen between April 2013 and September 2015. The Lambda-Mu-Sigma method was used for the curve fitting of body weight, body length, head circumference, chest circumference, and crown-rump length. Results The means and 3rd-97th percentile intrauterine growth curves for body weight, body length, head circumference, chest circumference, and crown-rump length were obtained for the 1 296 twin neonates with a gestational age of 27-40 weeks. The curve values of the 1 296 twin neonates for body weight, body length, head circumference, chest circumference, and crown-rump length were all lower than those of singleton neonates in Shenzhen that had been reported, and the difference increased with increasing gestational age. Conclusions The intrauterine growth curves for body weight, body length, head circumference, chest circumference, and crown-rump length of twin neonates with a gestational age of 27-40 weeks in Shenzhen obtained in this study can provide a reference for evaluating the intrauterine growth status of twin neonates among the current population in Shenzhen.
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深圳市宝安区科技创新局科技项目（2013057）。
