Philip Webre

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for most of human history, human girls arrived at menarche when our bodies had enough gluteofemoral fat and bone growth (and a suitably low amount of daily stress) that becoming pregnant might not be too harmful, which also usefully aligned with a point in human-typical brain development that would allow for maternal brain changes to not overlap with earlier puberty.
Eve: How the Female Body Drove 200 Million Years of Human Evolution
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