I think the flaw in this study (from what I can see) is that they are looking at pregnancy but measuring differences only post-child rearing. It has been repor

I think the flaw in this study (from what I can see) is that they are looking at pregnancy but measuring differences only post-child rearing. It has been reported that reduced sleep due to child rearing accelerates epigenetic aging (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10027398/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10027398/) which looks at the amount of sleep. This doesn't mean the pregnancy study is wrong. However, we'd need to look at the epigenetic clock pre-pregnancy, at labour, and post-child rearing to understand at what point in the cycle the aging biomarkers are shifting. We understand they shift post-pregnancy, I don't believe this study shows them to shift pre-labour.