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US girls got their first periods increasingly earlier over the last 50 years, new study finds (www.theguardian.com)

submitted 3 months ago by [email protected] to c/[email protected]

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Trend is especially pronounced among Black, Hispanic and Asian participants, and those who report lower socioeconomic status

Girls in the United States had their first periods earlier over the last five decades and it took longer to experience regular cycles, a new study has found.

The study, published in JAMA Network Open, found the trend is especially pronounced among Black, Hispanic, Asian and mixed race participants, and among those who reported lower socioeconomic status.

“This is important because early menarche,” or a first period, “and irregular periods can signal physical and psychosocial problems later in life,” said Zifan Wang, a postdoctoral research fellow at Harvard University’s TH Chan School of Public Health and lead author of the study.

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[–] [email protected] 8 points 3 months ago

I'm not qualified to answer this question, I merely provide citations for people who are too lazy to read the articles and simply go by social media post titles. These citations are also not necessarily an expression of my personal opinion.

General remarks: Memory recall is measureable / quantifiable to a certain degree: https://journals.sagepub.com/doi/10.1177/0956797620954812

Self-reports should only ever be used to augment better methods, but sometimes, it's all we have.