I have 3 daughters, a 15yr old and 2 11yrs old and all of them have started their periods really young. Is it true that there is a danger to the uterus growing out to other organs in their body? All my children developed far faster than their friends and their bodies at 11yrs look like they 15yrs. I on the other hand am very under developed, I am only just over 5ft, flat chested and look about 10yrs from behind, I didn't start my periods till almost 15yrs. I'm concerned about their health physically aswel as mentally because they've all had the pressure of this and it obviously is embarrassing for them, emotionally I think they've had much more to deal with than most kids their age. Should I be worried?