Overview
- A review published Tuesday in Current Obesity Reports synthesizes animal and human studies showing fathers can pass obesity risk to children through sperm changes, parenting habits and socioeconomic factors.
- The review reports that paternal obesity is linked to poorer sperm quality — lower concentration and motility and higher DNA fragmentation — and to a reported 30%–66% higher risk of male infertility.
- Animal experiments show clear epigenetic transmission of metabolic changes from fathers to offspring, but the authors emphasize that human evidence remains largely observational and causal pathways are not yet well defined.
- The authors highlight that some obesity-related epigenetic marks in sperm appear reversible with preconception lifestyle changes and they recommend father-inclusive steps such as preconception counseling, perinatal education and supportive workplace policies.
- The review frames these findings against rising obesity projections and calls for targeted human mechanistic research to guide interventions that could change how families, health systems and employers reduce childhood obesity risk.