https://www.cnn.com/2025/05/06/health/nutrition-early-menstruation-wellness
https://academic.oup.com/humrep/advance-article/doi/10.1093/humrep/deaf072/8125832?login=false#google_vignette (http://www.autoadmit.com/thread.php?thread_id=5721486&forum_id=2#48910624)