"Study Finds Girls Starting Periods Earlier Across Generations"

A Harvard T.H. Chan School of Public Health study reveals that the average age of first menstrual period (menarche) is decreasing among younger generations in the U.S., particularly among racial minorities and lower-income individuals. The time for menstrual cycles to become regular is also increasing. The study, part of the Apple Women’s Health Study, highlights the influence of factors like childhood obesity, diet, stress, and environmental pollutants on these trends, emphasizing the need for more research on menstrual health.