Assisted reproduction leaves a faint, genome-wide mark on DNA
A controlled study in laboratory mice has found that a standard series of assisted reproductive technologies (ART), including IVF and embryo culture, leads to a modest but statistically significant increase in the rate of new single-nucleotide mutations. Compared to naturally conceived mice, ART-derived mice showed approximately 30% more de novo mutations, a genome-wide effect not concentrated in any specific genomic region. While the study identifies ART as a mutagenic factor in mice, it found no change in the underlying mutation signatures, suggesting the procedures may broadly increase DNA vulnerability rather than introduce a new mutagenic process.
Why it might matter to you:
For a researcher focused on human genomic diversity and the origins of genetic variation, this work highlights a potential, non-inherited source of new mutations that could influence population-level genomic data. Understanding if similar effects occur in humans is critical for accurately interpreting de novo mutation rates in clinical genetics and for assessing the long-term genomic safety of widely used fertility treatments. This could inform risk-benefit analyses in personalized medicine, especially when considering the pharmacogenomic profiles of individuals conceived via ART.
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