What is the primary purpose of growth charts in pediatric assessment?

• A. To diagnose obesity in infancy
• B. To assess cognitive development over time
• C. To track growth over time and compare with standardized percentiles to identify under- or over-growth
• D. To measure head circumference only

Answer: (C)

Growth charts are used to monitor a child’s growth by plotting measurements against reference percentile curves over time. The important idea is to watch the trajectory, not a single measurement. When a child stays around the same percentile, growth is typically normal. If measurements cross percentiles or drop or rise significantly across visits, it signals potential under- or over-growth that deserves further assessment, such as nutritional issues, chronic illness, or endocrine concerns. While obesity risk can be flagged by higher percentiles, the main purpose is surveillance of growth trends across weight, length/height, and other relevant measurements (including head circumference in infancy). This approach helps clinicians identify problems early and guide appropriate follow-up, counseling, or investigations.