Fig. 1.

Ages 9–15 pubertal status with the Gompertz model equation line superimposed.

A nonlinear Gompertz growth model was fit to the seven observed occasions of self-reported pubertal status (including onset of menstruation and changes in body hair, breast, height, and skin) to estimate pubertal timing and tempo from ages 9 to 15. Participants included are from the neuroimaging sample (n = 107).