“…This comparison relects that our results from Punjab agree with past results. In several studies from different countries, the mean age at menarche has been 12.52 in India (Tarannum, Khalique, & Eram, 2018), 12.56 in Nepal (Chalise, Pradhan, Lama, Panta, & Dhungel, 2018), 13.66 in Ghana (Ameade & Garti, 2016), 12.78 in Iran (Tiyuri, Ghannadkai, Tiyuri, & Bahramian, 2019), 12.9 in Korea (Cho et al, 2010), and 12.54 in the United States (Anderson & Must, 2005). These observed differences can be attributed to the differences in data collection, geography, culture, climate, socioeconomic factors, lifestyles, diet, genetics, and many others.…”