“…Even the menarcheal age can vary within the same country, as shown in a study conducted in the US, where girls belonging to different races living in the US experienced variable mean menarcheal ages (Anderson & Must, 2005). Several factors influence age at menarche such as the menarcheal age of the mother (Ersoy, Balkan, Gunay, & Egemen, 2005; Tehrani, Mirmiran, Zahedi‐Asl, Nakhoda, & Azizi, 2010), socio‐economic status (James‐Todd, Tehranifar, Rich‐Edwards, Titievsky, & Terry, 2010; Khalid et al, 2015; Moodie et al, 2020), exposure to media (Latifah, Murti, & Dewi, 2017), environmental factors, educational level (Nwankwo, Danborno, & Oliver, 2017), nutritional status (Mpora et al, 2014), anthropometry (Goyal, Singh, & Sethi, 2016), family size, etc. The age at puberty in girls in industrialized countries appears to have gradually decreased from 16 to 17 years of age in the middle of the 19th century to 12–13 years in the late 20th century (Parent et al, 2003).…”