James P. Crowley’s Post

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Professor of Medicine emeritus at Brown University

One of the most important reasons is that women are starting puberty earlier. In the 1950s, the average age for periods to start was 13 – now it’s 11. There are theories about why this is – increasing obesity rates in children and dietary influences on hormone levels, for instance – but the truth is, it’s not really known why. We do know that the younger a girl is when they start, the longer her body is exposed to higher levels of estrogen. So women who start menstruatng early should be particularly a focus of the importance of learning early to examine their breasts properly and regularly which typically is not the practice. #breastcancerinyoungwomen #breastcancertreatment

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