<prompt> Central precocious puberty in a girl is defined as breast development before the age of?6 years8 years12 years10 years  <response>: b. 8 yearsRef: Nelsons 20e p2656, Ghai 8e p 534Central precocious puberty is defined by onset of breast development before the age of 8 yrs in girls and by onset of testicular development vol 4mL before the age of 9 yrs in boys, as a result of early activation of hypothalamic-pituitary-gonadal axis. 