New study details potential long-term health risks as American girls reach puberty earlier

A new study adds to the evidence that girls in America are reaching puberty earlier with potentially troubling implications for their long-term health. More girls are getting their first periods sooner than previous generations and experiencing longer periods of menstrual irregularity. Amna Nawaz discussed more with Dr. Shruthi Mahalingaiah of the Harvard T.H. Chan School of Public Health.
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