Study links hCG in IVF to epigenetic shifts in children's brain development

A new study by Jiang, Wei, Liu, and colleagues has uncovered a connection between hCG exposure during assisted reproductive technology (ART) and epigenetic changes in children conceived through these methods. The research highlights how the timing and dosage of hCG on the trigger day may influence neurodevelopmental outcomes in offspring. The study found that hCG administration during ART can alter DNA methylation patterns in offspring. These epigenetic modifications appear in genes linked to neuronal growth, differentiation, and synaptic plasticity. As a result, cognitive function, executive processing, and social behaviour in ART-conceived children may be affected.

The team observed that variations in hCG levels on the trigger day correspond to distinct methylation signatures in the children’s peripheral tissues. This suggests that hCG triggers intracellular signals which modify methylation at genes critical for neurodevelopment during embryo formation.

The researchers propose that adjusting hCG administration parameters could reduce adverse epigenetic and developmental effects. They also call for further investigation into paternal contributions and environmental factors interacting with hCG’s impact. The findings set a new benchmark for evaluating the long-term safety of reproductive interventions through multi-omics approaches. Clinicians are encouraged to implement comprehensive monitoring of ART offspring, including epigenetic screening and neurodevelopmental surveillance. This could help mitigate potential risks associated with hCG exposure during conception.