A new study from the Harvard T.H. Chan School of Public Health, the National Institute of Environmental Health Sciences, and Apple has revealed that the average age at which girls in the United States begin menstruating has been decreasing over the past … Read on blog or Reader ScienceBlog.com Read on blog or Reader Menstrual Cycles Starting Earlier and Taking Longer to Regulate Harvard University May 31 A new study from the Harvard T.H. Chan School of Public Health, the National Institute of Environmental Health Sciences, and Apple has revealed that the average age at which girls in the United States begin menstruating has been decreasing over the past several decades. The study, which analyzed data from more than 71,000 participants in […] Continue reading

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