When Will I Start Developing? (for Teens) (2024)

Lots of girls and guys worry about when their bodies will develop. Guys wonder when their voices will get deeper, when they'll need to shave, or when their penises will grow. Girls want to know when their breasts will develop or when they'll get their first period. If a friend or a younger brother or sister develops first, they may worry that there's something wrong with them.

Different Variations of Normal

The fact is that physical development starts at different times and progresses at different rates in different people. So, the beginning of the development that comes with puberty varies from person to person — and that's completely normal.

The earliest physical change of puberty for girls is usually breast development, which most often begins around 10 or 11 years. But it's perfectly normal for breast development to start anytime between the ages of 7 and 13. A girl's first menstrual period usually happens about 2 to 2½ years after breast development begins.

Boys begin their development on average around age 10 or 11, but it's also normal to begin anytime between the ages of 9 and 15. Girls and guys who start developing earlier or later than these ranges can still be normal, but they should be checked by their doctor just to be sure.

For both boys and girls, it usually takes several years after the first changes of puberty begin before they're all complete — and there's a lot of variation from person to person. So, two normally developing guys or girls who are the same age can appear quite different from each other. One can look older and more physically mature than the other. But the one who started later will catch up in time.

Can I Do Anything to Speed Up Development?

You can't do anything to make your body develop faster. Of course, you should eat a nutritious diet, exercise, and get enough sleep. But special diets, dietary supplements, or creams won't do anything to make normal puberty happen quicker.

If you're a girl who's 13 or older or a boy who's 15 or older and you haven't shown any signs of puberty (or if you're younger but are still worried), talk with your doctor.

When Will I Start Developing? (for Teens) (2024)

FAQs

Is it normal to be flat chested at 12? ›

Some girls may feel like their breasts will never start growing. But girls start developing at different ages and different rates. One girl might have more developed breasts at 12, while her friend is still waiting. Breast development happens in stages.

What age do boobs stop growing? ›

For most people, their breasts will stop growing by the age of 18, though many breasts tend to stop developing around two years after their first period, as puberty slows down. However, the full process can take up to four or five years and fluctuations in weight can also play a part in breast growth.

At what age do nipples fully develop? ›

Breasts usually start to develop around the age of 9 to 11, but it's normal for them to start earlier or later. By the age of 17, breasts will usually be fully developed, although this may take a bit longer.

Why is my breast not growing at 17? ›

Typically, you can expect your breasts to stop growing between the ages of 17 to 18. Many girls' breasts stop growing around two years after their first period, which is when puberty starts to slow down.

Why is my chest so big at 11? ›

Pectus carinatum is a chest wall problem where the front of the chest sticks out more than it should. It happens when the ribs and breastbone (sternum) grow outward more than usual. The condition mostly affects boys and usually gets worse during adolescence, especially during growth spurts and the teen years.

What is the average breast size for 16 year olds? ›

There isn't an average, but I'd say a C cup is around the average for a 16 year old. Regardless of your size, whether it's small or large, there are people who will love you and bend over backwards in order to make you happy, so don't let it discourage you if you are unhappy with your bra size.

How to predict your future breast size? ›

Here are the biggest factors that determine the overall size of your breasts.
  1. Your family history. ...
  2. Your weight. ...
  3. Your workout routine. ...
  4. Your period. ...
  5. Your birth control. ...
  6. Your pregnancy and postpartum. ...
  7. Your age.
Nov 10, 2019

What is the average breast size? ›

While it's really difficult to precisely determine the standard breast size in the U.S. (or anywhere in the world, for that matter), we do know that the average breast size in America is a 34DD.

Which age is best for breast growth? ›

The earliest physical change of puberty for girls is usually breast development, which most often begins around 10 or 11 years. But it's perfectly normal for breast development to start anytime between the ages of 7 and 13.

Does playing with breasts increase growth? ›

As your body develops, you might hear all sorts of rumors, like touching or massaging breasts makes them grow. That's not true.

What is a breast bud in a 14 year old? ›

A breast bud is a lump that develops under the nipple in the first stage of breast growth. The lump may be tender and sore, but it is completely normal in girls undergoing puberty.

How does a normal breast look? ›

There's no such thing as the perfect or perfectly normal breast. They come in all shapes and sizes. Even on the same person, one breast can be a different size or shape than the other. Nipples and the surrounding skin, called the areola, vary in size, shape, and color as well.

Why am I flat chested at 17? ›

Most women are genetically predisposed to having small breasts, just as they are programmed to be a certain height or weight. This is usually aesthetic, as opposed to the medical definition of post-puberty underdeveloped breasts, known as micromastia (as well as hypomastia, breast hypoplasia and mammary hypoplasia).

How do you know if your breasts are fully developed? ›

Most women see their breasts done growing in their early 20s however, some doctors don't consider breasts fully developed until a woman has given birth and produce milk. Pregnancy plays a different part with every woman as some experience a big difference in size and some women see little change.

Why are my breasts not growing at 12? ›

Girls' bodies need enough fat before they can go through puberty or get their periods. Problems in the pituitary gland or thyroid gland, which make hormones important for body growth and development, also can delay puberty. Chromosome disorders can delay puberty in some people.

Are breasts normal at 12? ›

Age: they normally occur in 8 to 12 year old girls. They are the first sign of puberty. Sometimes, they are even normal in 7 year olds. Importance: the entire breast develops from the breast bud, taking 2 or 3 years to completion.

How big should your bust be at 12? ›

Bra Measurements
UnderbustOverbust (cm)
(cm)AU SizeCup E
71-761092-94
77-821297-99
83-8814102-104
8 more rows

What is the average chest size for a 12 year old girl? ›

Click here to download
Age1112
Chest Size (inches)3032
Chest Size (cm)7681
Waist Size (inches)2224
Waist Size (cm)5661

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