AimTo explore the simultaneous impact of parental adiposity and education level on infant growth from birth to 12months, adjusting for known early-life risk factors for subsequent childhood obesity. MethodsBaseline data for 197 one-year-old children and their parents, participating in a longitudinal obesity intervention, were used. Obesity risk groups, high/low, were defined based on parental body mass index (n=144/53) and parental education (n=57/139). Observational data on infant growth between 0 and 12months were collected. The children's relative weight (body mass index standard deviation score) at 3, 6 and 12months and rapid weight gain 0-6months were analysed in regression models, with obesity risk as primary exposure variables, adjusting for gestational weight gain, birth weight, short exclusive breastfeeding and maternal smoking. ResultsRelative weight at 3, 6 and 12months was associated with low parental education but not with parental adiposity. No significant associations were observed with rapid weight gain. None of the early-life factors could explain the association with parental education. ConclusionLow parental education level is independently associated with infant growth, whereas parental obesity does not contribute to a higher weight or to rapid weight gain during the first year.