ALERT

For the latest coronavirus care instructions and resources, please call our COVID-19 hotline at 208-381-9500. Find additional information and resources here and learn more about how we’re working to keep you healthy and safe.

toggle mobile menu Menu
toggle search menu

Site Navigation

Supplemental

Menu

Physical Development, Ages 15 to 18 Years

Physical Development, Ages 15 to 18 Years

Topic Overview

By age 15, most girls have had their first menstrual period and have completed the rapid growth spurt that usually occurs during puberty. After the first period, teenage girls grow 1.5 in. (3.8 cm) to 3 in. (7.6 cm) on average. Other early changes of puberty, such as the growth of pubic hair and breasts, have also occurred. Teenage girls tend to complete breast development an average of 4 years after breast buds signal the beginning of puberty.

The growth spurt in boys tends to reach its peak sometime during the early to mid-teen years. Although boys lag behind girls in height in early adolescence, they generally end up being taller than girls by age 18. After growth starts, boys grow at a faster rate and for a longer period of time. Also, boys usually continue growth of facial hair, penis and testicles, and pubic hair during the late teen years.

These and other physical changes are highly variable by individual. Some individuals are "early bloomers," and others grow and develop later.

Your teen's doctor may use a growth chart to track how your teen is growing.

Credits

Current as of: August 22, 2019

Author: Healthwise Staff
Medical Review:
Susan C. Kim MD - Pediatrics
Kathleen Romito MD - Family Medicine
John Pope MD - Pediatrics

This information does not replace the advice of a doctor. Healthwise, Incorporated disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Healthwise is a URAC accredited health web site content provider. Privacy Policy. How this information was developed to help you make better health decisions.

© 1995-2015 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.