What is the standard weight for a two-month-old infant?

The standard weight for a two-month-old infant varies depending on gender and individual differences. Specifically, the normal weight range for boys is 5.25–7.05 kg, with a median of 5.68 kg; for girls, the normal range is 4.82–6.51 kg, with a median of 5.21 kg. These values are based on height and weight charts for children and adolescents, while also taking into account the infant's birth weight. Generally, during the first three months, infants gain approximately 0.7–1 kg per month. By three months of age, most infants will have doubled their birth weight. It should be noted that an infant's weight gain reflects their feeding and nutritional status, and any abnormalities should prompt timely medical consultation.