Serial monitoring of weight and head circumference in toddlers is essential for the early detection of growth disturbances, since a single measurement cannot capture the dynamics of growth over time. This study aimed to describe the change patterns of weight and head circumference among toddlers over a three-month observation period (October–December) and to identify the proportion of toddlers experiencing an increase, stagnation, or decrease in each anthropometric indicator. A quantitative descriptive study with a retrospective longitudinal design was conducted using secondary anthropometric monitoring data. Through a data screening and matching process across the three measurement periods, 99 toddlers with complete weight and head circumference records were included in the analysis; one implausible weight value in December (101.0 kg) was corrected to 10.1 kg following verification against the primary data. Data were analyzed descriptively using mean, median, standard deviation, minimum, and maximum values, and monthly changes were categorized as increasing, stagnant, or decreasing. The mean weight increased from 11.38 kg in October to 11.88 kg in December, with 78.8% of toddlers showing an increasing trend, 6.1% stagnant, and 15.2% decreasing. The mean head circumference increased from 47.07 cm to 47.49 cm, with only 45.5% showing an increasing trend, 30.3% stagnant, and 24.2% decreasing. Weight and head circumference exhibited distinct change patterns during the observation period, indicating that both indicators provide complementary information for growth monitoring. Continuous, serial anthropometric monitoring is recommended to support the early identification of growth disturbances in toddlers.
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