Sana nasıl yardımcı olabilirim?

In relevance to what does the age of menstrual cycle change?

Even though starting the menstrual cycle varies between 9 to 15 ages, this also varies based on climate, society, social and economic environment and even family. For example, girls in living modern and big cities, warm climates, girls who are visually impaired, living in areas closer to Ecuador and sea level and overweight girls get their menstrual bleedings at an earlier age.