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Old 08-07-2011
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Default Rules of Thumb for Growth

Rules of Thumb for Growth
1. Weight loss in first few days: 5%-10% of birth weight
2. Return to birth weight: 7-10 days of age
Double birth weight: 4-5 mo
Triple birth weight: 1 yr
Quadruple birth weight: 2 yr
3. Average weights:
3.5 kg at birth
10 kg at 1 yr
20 kg at 5 yr
30 kg at 10 yr
4. Daily weight gain:
20-30 g for first 3-4 mo
15-20 g for rest of the first yr
5. Average annual weight gain: 5 lb between 2 yr and puberty (spurts and plateaus may occur)
Average length: 20 inches at birth, 30 inches at 1 yr
At age 3 yr, the average child is 3 ft tall
At age 4 yr, the average child is 40 in tall (double birth length)
Average annual height increase: 2-3 inches between age 4 yr and puberty
Head Circumference (HC)
Average HC: 35 cm at birth (13.5 inches)
HC increases: 1 cm/mo for first yr (2 cm/mo for first 3 mo, then slower); 10 cm for rest of life
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