Find Information About:

Drugs & Supplements

Get information and reviews on prescription drugs, over-the-counter medications, vitamins, and supplements. Search by name or medical condition.

Pill Identifier
WebMD

Pill Identifier

Having trouble identifying your pills?

Enter the shape, color, or imprint of your prescription or OTC drug. Our pill identification tool will display pictures that you can compare to your pill.

Get Started
My Medicine
WebMD

My Medicine

Save your medicine, check interactions, sign up for FDA alerts, create family profiles and more.

Get Started

WebMD Health Experts and Community

Talk to health experts and other people like you in WebMD's Communities. It's a safe forum where you can create or participate in support groups and discussions about health topics that interest you.

  • Second Opinion
    WebMD

    Second Opinion

    Read expert perspectives on popular health topics.

  • Community
    WebMD

    Community

    Connect with people like you, and get expert guidance on living a healthy life.

Got a health question? Get answers provided by leading organizations, doctors, and experts.

Get Answers

Sign up to receive WebMD's award-winning content delivered to your inbox.

Sign Up

Teen Girls' Health

Font Size
A
A
A

Girls and Puberty

Girls, see if this sounds familiar. You look in a mirror one morning and notice you're taller -- and rounder. Through your nightgown, you see your breasts are bigger. You don't remember looking like that a few weeks ago! Over the next few weeks, you start noticing hair in places you've never had hair before. You've heard girls at school talk about getting their periods, and you wonder if that will happen to you soon. You feel ultraconfident, and then super sensitive -- all in the same day. What in the world is going on? Welcome to puberty.

Technically speaking, puberty is nature's way of transforming a child into an adult, all for the sake of reproduction. While both girls and boys go through puberty, girls reach puberty and sexual maturity at earlier ages than boys do.

Recommended Related to Teen Girls

Your Vagina: 7 Things Every Owner Should Know

Your vagina is just another part of you, just like your heart or brain or legs. So it makes sense to get to know it. "Some women don't have any idea what's normal and what's not normal," says Jennifer Ashton, MD, author of The Body Scoop for Girls: A Straight-Talk Guide to a Healthy, Beautiful You. And that can cause many young women to think that everything's bad. These suggestions can help you be smart and healthy about your vagina. 1. Know what your girl parts look like. You...

Read the Your Vagina: 7 Things Every Owner Should Know article > >

So what's causing all of these changes? Hormones! Actually, the female hormone estrogen is the main one that's triggering all the changes in your body. Let's look at some of the changes girls can expect at puberty.

Increase in Height and Weight

Starting at around age 9, girls begin to gain about 17% to 18% of their adult height. If someone has commented that you are "all hands and feet," it's true! Your limbs grow first, then your trunk. Most girls grow fastest about six months before they start their first period (menarche).

You'll probably gain weight in puberty -- most girls do. You may notice more body fat along the upper arms, thighs, and upper back. Your hips will grow rounder and wider; your waist will become narrower.

Your doctor will check your height and weight each year to make sure you are growing properly. If you are gaining weight too fast, you may need to increase your exercise and substitute fruits and vegetables for junk foods.

Puberty Breast Development

Breast development is an early sign of puberty in girls. This can happen before age 9 in some girls, but later in others.

If you are self-conscious, you might want to start wearing a "training bra," which is a soft bra with no real support. 

Talk to your mom, older sister, or an aunt about buying a training bra. They can help you to make sure you get one that is comfortable and that lets you feel confident in your clothes.

1 | 2 | 3

Today on WebMD

Girl holding up card with BMI written
fitTool
teen girl with lotion on face
Slideshow
 
period
Video
Young couple holding hands
Quiz
 
Blemish Blasters Tips For Acne Free Skin
Slideshow
teen girl on swing
Quiz
 
Abused woman
Article
Taylor Swift
fitSlideshow
 
The Pill Myths And Facts
Article
Smiling woman, red hair
Slideshow
 
teen sleeping
fitArticle
Eye make-up closeup
Quiz