dd1 is only just 9 and already has some breast development and some pubic hair. Wondering how many other 9 year olds girls are already at this stage? It just seems so young. Any ideas how much longer after this first stage that periods actually start? She just doesn't seem ready to cope with all that yet - emotionally immature but her body is going ahead of her. She isn't particularly tall or heavy for her age either, about average in fact, and I didn't start my periods early either (about 13).