Developmental Standards for One-Year-Old Infant Health Checkup

Due to gender differences and variations in postnatal nutrient absorption, one-year-old babies may exhibit different growth and development patterns. For example, boys should have a height within the range of 71–80 cm, while girls should measure between 70–78 cm. Differences in nutrient absorption can also lead to variations in body weight. A one-year-old boy typically weighs around 8–12 kg, whereas a one-year-old girl usually weighs between 7.5–11 kg. Babies—both boys and girls—who absorb nutrients well and develop more rapidly may already be able to stand independently, walk while holding hands, and use gestures to express their needs. However, those with poorer nutrient absorption may show slower development compared to their peers with better absorption. As long as there are no obvious abnormalities in the baby's daily behavior, parents need not be overly concerned.