While the average age reduced by a relatively small amount, the percentage of girls whose first period would be classified as ‘early’ or ‘very early’ has nearly doubled, finds the Apple-sponsored study published in JAMA Network Open.
This is a companion discussion topic for the original entry at https://www.sciencemediacentre.co.nz/2024/05/30/girls-are-getting-their-periods-earlier-expert-reaction/