Puberty isn’t what it used to be. Over the past few decades, the average age when kids start developing has dropped and for many parents, that can feel scary, confusing, and overwhelming.
When we got our first periods, most of us didn’t think much about whether it was “early” or “late.” It just happened. But now, with headlines about hormone disruptors, environmental chemicals, and childhood obesity, parents are understandably asking:
Is this normal or should I be worried?
Let’s break it down.
When Do Most Girls Get Their First Period?
Most girls start their first period about two years after the earliest signs of puberty, which include:
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Breast budding
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Pubic hair
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A growth spurt
Today, the average age puberty begins is around 10½, meaning most first periods happen between 11 and 13 though family history plays a role, and there will always be early and late bloomers.
Getting a period at 9 or 10 can still be normal.
Not having one by 16 or 17 may need evaluation.
There is no “perfect” age just a range.
What Looks Like Puberty But Isn’t
Some changes can look alarming but aren’t actually true puberty.
Premature Adrenarche
This can show up as:
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Light pubic or underarm hair
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Body odor
It’s caused by adrenal hormones not ovarian hormones and does not mean your child will get their period early.
Premature Thelarche
This is isolated breast development in toddlers or young children. Puffy nipples or small breast buds may appear and stay for years without progressing. Again this is not true puberty.
Both are common and harmless.
When Is Puberty Truly “Too Early”?
Puberty that starts before age 8 is called precocious puberty and should be evaluated.
In rare cases, it can be triggered by:
- Thyroid or pituitary disorders
- Ovarian hormone issues
- Tumors
Doctors may use blood tests and imaging to find the cause. The good news?
If needed, puberty can be safely paused with medication to protect growth and development.
What If Puberty Is Moving Too Fast?
Even if puberty starts at a normal age, it shouldn’t race ahead.
If a child begins menstruating within a year of their first breast development, doctors may want to check in especially because early periods can shorten the time a child has to grow.
A simple X-ray of the hand (called a bone age test) can show whether growth plates are closing too soon.
Why Growth Matters
Once a period starts, most kids only grow for about two more years sometimes less.
If puberty happens too quickly, growth can stop earlier than expected.
Monitoring growth patterns is one of the best ways doctors decide whether to intervene.
Most early changes are normal variations of development not medical problems.
Only about 2% of kids experience true precocious or rapidly progressing puberty that needs treatment. And when it does happen, doctors have safe, effective ways to help.
If something feels off, trust your instincts and talk to your pediatrician.
And no matter what stage your child is in remind them that their body is not “wrong.” It’s just growing on its own timeline.
When the time comes for period care, Tampon Tribe offers organic, non-toxic, body-safe options designed for sensitive, developing bodies because first periods should come with support, not stress. 💛🩸