健康婴儿的体格各不相同。尽管如此，婴儿生长发育通常有迹可循。参考以下婴儿第一年生长的一般准则：
- 从出生到 6 月龄，婴儿可能每个月生长 1/2 到 1 英寸（约 1.5 到 2.5 厘米），每周增重 5 到 7 盎司（约 140 到 200 克）。约 5 月龄时，婴儿体重预计是出生时的两倍。
- 从 6 月龄到 12 月龄，婴儿可能每个月生长 3/8 英寸（约 1 厘米），每周增重 3 至 5 盎司（约 85 至 140 克）。约 1 岁时，婴儿体重预计是出生时的三倍。
医生会在健康婴儿常规检查中跟踪记录婴儿的生长情况，并可能在标准生长图表上标记婴儿的生长情况。
谨记，许多健康的婴儿都会经历体重停止增加、甚至体重略微减少的短暂时期。仅婴儿从一次健康婴儿检查至下次健康婴儿检查时无增重，医生才可能担心。生长曲线图上婴儿的位置并不如曲线整体趋势那样重要。
Jan. 11, 2022
- Growth charts. Centers for Disease Control and Prevention. https://www.cdc.gov/growthcharts. Accessed July 26, 2017.
- Kliegman RM, et al. The first year. In: Nelson Textbook of Pediatrics. 20th ed. Philadelphia, Pa.: Elsevier; 2016. https://www.clinicalkey.com. Accessed July 27, 2017.
- Kliegman RM, et al. Assessment in growth. In: Nelson Textbook of Pediatrics. 20th ed. Philadelphia, Pa.: Elsevier; 2016. https://www.clinicalkey.com. Accessed July 27, 2017.
- Birth to 24 months: Boys length-for-age percentiles and weight-for-age percentiles. Centers for Disease Control and Prevention. https://www.cdc.gov/growthcharts/who_charts.htm. Accessed July 27, 2017.
- Birth to 24 months: Girls length-for-age percentiles and weight-for-age percentiles. Centers for Disease Control and Prevention. https://www.cdc.gov/growthcharts/who_charts.htm. Accessed July 27, 2017.
- Hoecker JL (expert opinion). Mayo Clinic, Rochester, Minn. July 29, 2017.
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