Puberty at age 9?!! Where did you learn biology, at the UP madarsa?
Puberty around 13-14 is what is normal, and even there, the body is not really ready for childbirth. Young girls who are pregnant at 13 or 14 have the HIGHEST RISK for pregnancy-related deaths, and most often deliver a stillborn fetus.
Verify this from a good doctor, and not a mullah.
"Prophet" Muhammad also thighed Aisha when she was 6. Thighing is to place the penis between the thighs of the girl.