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Normal growth and development

Diet - intellectual development

A child's growth and development can be divided into four periods:

  • Infancy
  • Preschool years
  • Middle childhood years
  • Adolescence

Soon after birth, an infant normally loses about 10% to 12% of their birth weight. By about age 2 weeks, an infant should start to gain weight and grow quickly.

By age 4 to 6 months, an infant's weight should be double their birth weight. During the second half of the first year of life, growth is not as rapid. Between ages 1 and 2, a toddler will gain only about 5 pounds (2.2 kilograms). Weight gain will remain at about 5 pounds (2.2 kilograms) per year between ages 2 to 5.

Between ages 2 to 10 years, a child will grow at a steady pace. A final growth spurt begins at the start of puberty, sometime between ages 9 to 15.

The child's nutrient needs correspond with these changes in growth rates. An infant needs more calories in relation to size than a preschooler or school-age child needs. Nutrient needs increase again as a child gets close to adolescence.

A healthy child will follow an individual growth curve. However, the nutrient intake may be different for each child. Provide a diet with a wide variety of foods that is suited to the child's age.

Healthy eating habits should begin during infancy. This can help prevent diseases such as high blood pressure and obesity.

INTELLECTUAL DEVELOPMENT AND DIET

Poor nutrition can cause problems with a child's intellectual development. A child with a poor diet may be tired and unable to learn at school. Also, poor nutrition can make the child more likely to get sick and miss school. Breakfast is very important. Children may feel tired and unmotivated if they do not eat a good breakfast.

The relationship between breakfast and improved learning has been clearly shown. There are government programs in place to make sure each child has at least one healthy, balanced meal a day. This meal is usually breakfast. Programs are available in poor and underserved areas of the United States.

Talk to your health care provider if you have concerns about your child's growth and development.

Related topics include:

Open References

References

Barrett KJ, Gilley SP, Haemer MA, Krebs NF, Johnson SL. Feeding healthy infants, children, and adolescents. In: Kliegman RM, St. Geme JW, Blum NJ, et al, eds. Nelson Textbook of Pediatrics. 22nd ed. Philadelphia, PA: Elsevier; 2025:chap 61.

Onigbanjo MT, Feigelman S. The first year. In: Kliegman RM, St. Geme JW, Blum NJ, et al, eds. Nelson Textbook of Pediatrics. 22nd ed. Philadelphia, PA: Elsevier; 2025:chap 23.

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Review Date: 2/17/2024

Reviewed By: Charles I. Schwartz, MD, FAAP, Clinical Assistant Professor of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, General Pediatrician at PennCare for Kids, Phoenixville, PA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

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