月(年)龄体重(kg)(平均值)身长(cm)(平均值)头围(cm)(平均值)
初生2.5~4.2(3.3)46.2~54.8(50.5)31.9~36.7(34.3)
1月3.0~5.6(4.3)49.9~59.2(54.6)35.5~40.7(38.1)
2月3.6~6.7(5.2)53.2~62.9(58.1)37.1~42.3(39.7)
3月4.2~7.6(6.0)56.1~66.1(61.1)38.4~43.6(41.0)
4月4.8~8.4(6.7)58.6~68.7(63.7)39.7~44.5(42.1)
5月5.4~9.1(7.3)60.8~71.0(65.9)40.6~45.4(43.0)
6月6.0~9.7(7.8)62.8~72.9(67.8)41.5~46.7(44.1)
7月6.5~10.2(8.3)64.5~74.5(69.5)42.0~47.0(44.5)
8月7.0~10.7(8.8)66.0~76.0(71.0)42.5~47.7(45.1)
9月7.4~11.1(9.2)67.4~77.3(72.3)42.7~48.1(45.4)
10月7.7~11.5(9.5)68.7~78.6(73.6)43.0~48.6(45.8)
11月8.0~11.9(9.9)69.9~79.9(74.9)43.4~48.8(46.1)
12月8.2~12.2(10.2)71.0~81.2(76.1)43.9~49.1(46.5)
15月8.8~13.1(10.9)74.1~84.8(79.4)44.5~49.7(47.1)
18月9.3~13.8(11.5)76.7~88.1(82.4)45.2~50.0(47.6)
21月9.7~14.4(12.0)79.1~91.2(85.1)45.5~50.7(48.1)
24月10.1~15.0(12.6)81.3~94.0(87.6)46.0~50.8(48.4)
2.5岁10.9~16.2(13.7)85.8~98.7(92.3)46.6~51.4(49.0)
3岁11.8~17.5(14.7)89.9~103.2(96.5)47.0~51.8(49.4)