| | Family Health | Teen Health Which age girl have periods? Menstrual periods typically begin between the ages of 12 and 15, but can start as early as 8 or as late as 16. This is known as the age of menarche. Teen Health - Related Articles Childhood ADHD: Can You Outgrow It? Cholesterol Levels Vs. Plaque Buildup How to Cure Obesity How to File for Short Term Disability in California The Differences Between Minor Depression & Major Depression If you drink more water will not sweat? Can starting the pill cause sore breasts?