[jennyjuniper]

This child must have started menustrating and the mother must have been aware of that? Once a girl starts menustration it's time to sit thenm down and prepare them for the fact that even if you think they are not sexually active, pregnancy can occur if they have sex and don't take precautions.
Having said that, a lot of parents don't believe or don't want to believe that a child as young as 11 will be sexually active.