Research

Hormonal

Rapid postnatal weight gain (catch-up growth) in infants born small for gestational age (SGA) or growth-restrained in utero significantly increases the risk of central fat deposition, insulin resistance, and adult obesity.

If your baby was born small for their gestational age, be mindful of rapid weight gain in the first two years. While catching up in height is good, excessive weight gain can lead to higher body fat and insulin resistance later in life. Focus on healthy feeding practices, such as breastfeeding and introducing solids at 6 months, rather than forcing high caloric intake.

GoodSupportsHIGH confidence
infants who have been growth restrained in utero tend to gain weight more rapidly, or ‘catch up’, during the early postnatal period, which leads to increased central fat deposition.
Kenneth Ong · Hormone Research in Paediatrics · 2006

Why this rating

Supported by multiple epidemiological studies, systematic reviews, and animal models, though human mechanistic data is less definitive than animal data.

Source

Size at Birth, Postnatal Growth and Risk of Obesity

Kenneth Ong · Hormone Research in Paediatrics · 2006

DOI 10.1159/000091508

narrative_reviewCited 272×
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DOI resolved against Crossref · corpus check 2026-06-10

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