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Genetic Inheritance Accounts for Most Parent-Child Obesity, With Maternal Nurture Impacting Teens

Trio-based analysis finds direct inheritance explains most BMI transmission with maternal genetic nurture producing a modest adolescent effect.

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Overview

  • The PLOS Genetics study analyzed genetic and health information from 2,621 UK mother–father–child trios, tracking BMI and diet at six key stages between ages three and 17.
  • Inherited obesity-related genes explained the majority of parent-child BMI correlations, highlighting the strong hereditary basis of familial obesity.
  • Noninherited maternal genes exerted a measurable environmental influence on adolescent BMI but showed minimal impact during early childhood.
  • Paternal influence on offspring weight was limited to directly inherited genes, with no significant indirect effects detected.
  • Researchers recommend interventions focused on maternal health during pregnancy and adolescence to help curb childhood obesity, as 27 percent of UK children aged two to 15 are overweight or obese.