“…As well as 7.9% did not answer or forgot. There were 7.8% who reported not having menstruation (Afriliana, Puspitaningrum, & Rahmawati, 2014) Nationally, the average menarche of 13-14 years occurs in 37.5% of Indonesian children (Septina, Nurohmah, Nurjannah, & Kartikasari, 2021). The average age of menarche 11-12 years occurs in 30 children in Jakarta, and 12.1% in West Nusa Tenggara.…”