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Abstract：
We first established percentile reference curves for infant length and head circumference in Hainan Province based on gender and age in months and compared them with the 2022 national standards and World Health Organization (WHO) standards. This cross-sectional survey involved 2736 infants (1471 boys and 1265 girls) in 18 cities and counties in Hainan Province. Standardized instruments were used to measure head circumference and length. Reference values for Hainan infants\' length and head circumference were determined using the LMS method. Curves were generated using the LMS Chart Maker software. According to the newly established reference curves, the length and head circumference of Hainan infants exhibited a consistent trend of steady growth. However, the average head circumference was below the 2022 national reference values and WHO standards. The mean length was lower than the new national reference values but roughly consistent with the WHO standards. Differences exist in infant length and head circumference in Hainan compared to national and global averages. To enhance infant length and head circumference growth, the health department should encourage exclusive breastfeeding for the first 6 months, ensure infants\' sleep needs at night, and promote the regularity of vitamin D supplementation during the perinatal period.
摘要：
我们首先根据性别和月龄建立海南省婴儿身长和头围百分位参考曲线,并与2022年国家标准和世界卫生组织(WHO)标准进行比较。这项横断面调查涉及海南省18个市县的2736名婴儿（1471名男孩和1265名女孩）。使用标准化仪器测量头围和长度。使用LMS方法确定海南婴儿身长和头围的参考值。使用LMS图表制作软件生成曲线。根据新建立的参考曲线，海南婴幼儿身长和头围呈稳定增长趋势。然而,平均头围低于2022年国家参考值和世卫组织标准.平均长度低于新的国家参考值，但大致符合WHO标准。与全国和全球平均水平相比，海南的婴儿身长和头围存在差异。为了提高婴儿的身长和头围增长，卫生部门应鼓励头6个月纯母乳喂养，确保婴儿晚上的睡眠需求，促进围产期补充维生素D的规律性。
