Approximate chronological ages corresponding to each physiological maturity classification are: A – 9 to 30 months, B – 30 to 42 months, C – 42 to 72 months, D – 72 to 96 months, and E – older than 96 months (Tatum, 2007).
Approximate chronological ages correspondingto each physiological maturity classification are: A – 9 to 30 months, B – 30 to 42 months, C – 42to 72 months, D – 72 to 96 months, and E – older than 96 months (Tatum, 2007).