Menstruation (period) or monthly flow, is normal vaginal bleeding that occurs as part of a woman's monthly cycle. Every month your body prepares for pregnancy. if no pregnancy occurs, the uterus (womb) sheds its lining. the menstrual blood is partly blood and partly tissue from inside the uterus. It passes out of the body through the vagina.
According to Medline-plus, Periods usually start between age 11 and 14.
However, Periods may start as young as 8 years and still considered normal, the length time between the first day and the last day of the next period is about 21-45 days in young women and 21-31 days in adults which is an average of 28 days. bleeding usually last around 3 to 5 days. Menopause starts at about age 45 and 55. During menstruation, you may have other conditions such as menstrual pains like lower back pain, craving for food, bloating or enlargement of breast , abdominal cramping pain, headache and fatigue. The colour of the Menstrual blood can also state a lot about your health. Read more