Signs of buloogh
Q: What are the signs of buloogh?
For a boy there are three signs,i.e Seeing a wet dream, ejaculation and impregnating.
For a girl it is also three: Haidh (mensus), wet dream and falling pregnant.
If both do not see any one of the three signs then they will automatically become baaligh at the age of fifteen islamically.
Fatawaa Mahmoodiyah Vol 17 pg 196