中文摘要：

目的制定母亲分娩年龄别胎儿出生时身长体重指数。方法采用横断面时间段整群取样现况调查方法,2013-2015年深圳市两家医院完成了16 388例不同胎龄活产新生儿体格生长现场测量,用以制定分娩年龄别胎儿出生时身长体重指数。结果制定了2015年深圳母亲分娩年龄别（≤18岁、19~38岁的每一岁、≥39岁）胎儿（男、女、合计）三分组出生时身长体重5项指数[即：克托莱指数（Quetelet Index,QI）;考浦指数（Kaup Index,KI）;劳雷尔指数（Rohrer Index,RI）;利比指数（Livi Index,LI）;勃洛克指数（Polock Index,PI）]均数和标准差。≤18岁组其胎儿出生时QI、KI、RI、LI、PI指数值最低,伴随分娩年龄增大胎儿出生时指数值不断递增,36岁组达到最大值（峰值）,分别比≤18岁组依次增加了3.69、3.63、0.07、0.27、208.64（t检验,P〈0.005,全部）,差异有统计学意义。37~38岁及≥39岁组上述5项指数值变为下降。QI、PI男婴高于女婴（t检验,P〈0.05,10个组）;RI、LI男婴低于女婴（t检验,P〈0.05,11个组）;KI的男女差异值很小（t检验,P〉0.05）。结论母亲分娩年龄增大其胎儿出生时人体密度、充实度、匀称性不断提高。母亲分娩年龄是胎儿宫内生长重要影响因素。

英文摘要：

Objective To establish length-weight index of fetus at birth on mother＇s delivery age. Methods By cross-sectional time cluster samples survey method,16388 newborn of Shenzhen two Hospitals from 2013 to 2015 were carried out the measurements of physical growth. Results The mean value and standard deviation of the five length-weight indexes（ Quetelet Index,QI; Kaup Index,KI; Rohrer Index,RI; Livi Index,LI; Polock Index,PI） about fetus at birth on mother＇s delivery age were established in Shenzhen.Fetus＇ indexes value of QI,KI,RI,LI,PI at birth were lowest,whose mothers＇ delivery age less than 19; Along with the increase of mother＇s delivery age,fetus＇ index value at birth was increasing. On the group of 36 years old,the index value was the largest,and it increased 3. 69,3. 63,0. 07,0. 27,208. 64 in QI,KI,RI,LI,PI respectively than the group of less than 18 years old,and the difference were statistically significant. On the each group of mother＇s delivery age more than 36,the five indexes value was declining.The values of QI and PI in boys were bigger than those of girls,and the difference was statistically significant in ten groups. The values of RI and LI in boys were lower than those of girls,and the difference as statistically significant in eleven groups. Conclusion Along with the increasing of delivery age,the density of body,enrichment degree and symmetry of fetus were improved continually. The mother delivery age was the important influence factor of fetus intrauterine physical growth and development.