If you do this every month, you may notice a pattern. It can take three to four years for your breasts to then fully develop, but you can expect your period about two years after your breasts start developing. A small amount of bleeding before your menstrual period is usually nothing to worry about, but continual spotting could signal a health problem. How often do periods come? A Cause for Concern?
Would I still be a virgin if I used tampons?
A Teen's Guide to Her First Period
What Can I Do? Alcohol - it can affect your life - for kids Boys' breasts - for boys who are teens Breasts - info for girls who are nearly teens Caring for your skin Chronic Fatigue Syndrome Dandruff Drugs - info for school children Eating disorders - what are they? Please enter your name Please enter your name. This happens because hormone levels are changing and she is changing from being a child to a woman. Premenstrual Syndrome Prolonged Periods: Learn how to read and understand these signs! This is because a girl's hormones might already be active.