My Body · Puberty, Explained
Why Everyone Develops Differently
By the eva team · · 2 min read
Two people of the same age can be at completely different stages of puberty. Genetics, family development patterns, hormone timing, nutrition and overall health can influence when puberty begins and how quickly it progresses. Developing earlier or later than your friends does not automatically mean something is wrong.
1. Why Don’t We All Develop At The Same Time?
You may notice that some classmates are taller, have developed breasts or have started their periods while others have not. Puberty happens across a range of ages, so people of the same age may look very different while both are developing normally.
2. Your Body Has Its Own Starting Time
Puberty begins when the brain activates a series of hormone signals. The timing of this activation is not exactly the same for everyone, which is one reason some bodies begin changing earlier and others begin later.
3. Family Patterns Can Influence Timing
Puberty timing can run in families. Someone whose parent or close biological relatives developed earlier or later may follow a similar pattern, although their experience will not necessarily be identical.
4. The Order And Speed Can Vary Too
Puberty is a process rather than one event. Breast development is often an early visible sign, followed by changes such as body hair, a growth spurt and eventually the first period. The spacing between these changes can differ from person to person.
5. Health And Nutrition Can Affect Development
Nutrition, long-term health conditions, intense physical training and some hormone-related conditions can affect the timing or progress of puberty. This does not mean normal differences are caused by something you did wrong.
6. Your Body Is Not A Competition
Developing before or after your friends does not make your body better, worse, more mature or less normal. Try to follow your own changes rather than comparing individual body parts, height or period timing with someone else.
7. Ask When The Timing Worries You
Speak with a trusted adult or healthcare professional if puberty changes seem to begin unusually early, have not begun within the expected age range, stop progressing or cause you concern. For girls, breast development before age eight is considered early, while no breast development by age thirteen should be checked.