Together with my brilliant colleagues Delaney Glass (UToronto) and Meredith Reiches (UMass Boston), we recently published our article “Coming of age in war: Early life adversity, age at menarche, and mental health” in the journal Psychoneuroendocrinology.

This was a special issue on forced migration and physiology, guest edited by Lee Gettler (Notre Dame) and Jelena Jankovic-Rankovic (University of South Carolina), and I think we probably compiled one of the most comprehensive reviews to date about armed conflict and menarche (first menstruation).

There are a couple of hypotheses about how child and adolescent bodies respond to early stressors: one is that bodies should mature quicker in times of uncertainty to increase one’s chances of reaching reproductive maturity. (The literature suggests that this does seem to happen under certain circumstances and types of stressors). The other is that maturation would be delayed, possibly due to energetic constraints.

We identified 36 samples from 29 studies in the literature that looked at armed conflict and menarche, with a range of methods and populations from around the globe. Here’s some of what we found…

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