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What Comes First During Puberty

Short answer

During puberty, what comes first typically involves the onset of hormonal changes that trigger physical and emotional development. For most, puberty begins with subtle signs like growth spurts or breast budding in girls, or testicular enlargement in boys, signaling the start of more visible changes to follow.

What Is Puberty in Simple Terms?

Puberty is the natural process where a child's body matures into an adult body capable of reproduction. It involves a series of physical and hormonal changes that occur over several years. This phase is marked by growth spurts, development of secondary sexual characteristics (like breasts or facial hair), and changes in body composition. Behind these changes are hormones, chemical messengers that tell the body when and how to grow. Puberty usually happens between ages 8 and 14 but can vary widely for each person. Understanding puberty helps prepare for the changes and reduces anxiety about this normal life phase. For a more detailed overview, see What Is Puberty and Why It Happens.

How Does Puberty Start and Progress?

Puberty starts when the brain signals the body to begin producing sex hormones. The hypothalamus releases a hormone called gonadotropin-releasing hormone (GnRH), which prompts the pituitary gland to release luteinizing hormone (LH) and follicle-stimulating hormone (FSH). These hormones stimulate the ovaries in girls and testes in boys to produce estrogen and testosterone, respectively. For example, if a 10-year-old girl's hypothalamus begins this signaling, within months, she may notice breast budding, her first physical sign of puberty. Boys might first notice their testicles enlarging before other changes like voice deepening or facial hair appear. Hormonal changes also trigger a growth spurt and changes in skin and body odor. The whole process can take several years to complete and happens in stages, with early, middle, and late puberty phases.

Why Does Knowing What Comes First in Puberty Matter?

Recognizing the first signs of puberty helps children, teens, and parents prepare for upcoming changes. Being aware reduces confusion and fear by normalizing what might otherwise seem strange or scary. For parents, knowing what to expect lets them provide support, guidance, and accurate information. For teens, understanding their body's changes builds confidence and encourages healthy habits, such as proper hygiene. It also helps identify when something might be unusual, like very early or very late puberty, which might require medical attention. Knowing the sequence of puberty can also foster empathy and communication between parents and teens during this sometimes challenging period.

What Are the First Physical Changes in Girls and Boys?

The first visible signs of puberty differ between girls and boys but typically follow a predictable pattern:

GenderFirst Physical ChangeTypical Age Range
GirlsBreast budding (called thelarche)8 to 13 years
BoysTesticular enlargement9 to 14 years

Girls usually notice small breast buds developing under the nipple area, which may feel tender. This signals rising estrogen levels. Soon after, they may experience pubic hair growth and a growth spurt. Boys first notice their testicles enlarge, often followed by the growth of pubic hair and a deepening voice. Both girls and boys also begin to sweat more and develop body odor due to sweat gland changes. These changes happen gradually and can vary in timing and sequence.

What Are Common Terms People Confuse With Puberty?

Some terms people mix up with puberty include:

Understanding these terms helps clarify what puberty includes and what happens afterward.

What Should Parents and Teens Do When Puberty Starts?

When puberty begins, open communication is key. Parents should talk honestly and age-appropriately about what to expect, including physical and emotional changes. Teens can benefit from learning about hygiene, nutrition, and emotional coping strategies. Practical steps include:

  1. Provide accurate information: Use trusted resources to explain the changes.
  2. Encourage questions: Create a safe space for teens to express feelings.
  3. Promote hygiene habits: Skin care, deodorant use, and dental care become more important.
  4. Support healthy nutrition and sleep: Growth needs proper fuel and rest.
  5. Watch for unusual changes: Very early or late puberty or distressing emotional symptoms may require medical advice.

Resources like Puberty for Beginners: What Kids Should Know and Personal Hygiene Tips for Young Adults offer helpful guidance for these steps.

How Can Teens Manage Emotional Changes During Puberty?

Alongside physical growth, puberty includes emotional and mental shifts due to hormone fluctuations. Teens may experience mood swings, increased sensitivity, or new feelings about self-image and relationships. Managing these feelings can involve:

Emotional changes are a normal part of puberty but knowing how to cope builds resilience for adulthood.

When Should You Consult a Doctor About Puberty?

If puberty signs appear much earlier than usual (before age 8 in girls or 9 in boys) or much later (no signs by 13 in girls or 14 in boys), it may be helpful to consult a healthcare provider. Doctors can evaluate if hormonal imbalances or health issues are involved. Also, if puberty causes significant distress or physical problems, medical advice can provide reassurance and treatment options. Parents can find a suitable doctor by reviewing tips in Choosing the Best Primary Care Doctor for Young Men. Regular checkups during growth years help monitor development and address concerns promptly.

Frequently asked questions

What is the average age puberty starts?

Puberty typically starts between ages 8 and 14 but varies widely. Girls often begin around 10 or 11, and boys around 11 or 12. Because of individual differences, some start earlier or later without problems. If concerned about timing, a healthcare provider can offer guidance.

Which comes first: growth spurts or body hair?

Usually, the first physical signs are breast budding or testicular enlargement, followed by pubic and underarm hair growth. Growth spurts often occur around the same time or shortly after these changes begin.

Can puberty start without visible changes?

Hormonal changes start internally before physical signs appear. Teens might not notice anything at first, but hormones are preparing the body for upcoming changes, which usually become visible within months.

How long does puberty last?

Puberty generally lasts 3 to 5 years, progressing through early, middle, and late stages. However, timing can differ, and some changes continue into late teens.

What if a child shows signs of puberty very early?

Early puberty, called precocious puberty, can sometimes indicate health issues but often is not serious. A doctor can evaluate and decide if treatment is needed to avoid potential effects on growth or emotional health.

Is emotional change a normal part of puberty?

Yes, hormone shifts affect mood and feelings. Teens may experience mood swings or heightened emotions. Learning coping strategies and talking openly can help manage these changes.

More on puberty basics →

Sources and further reading

General health education, not medical advice. For symptoms or emergencies, contact a doctor or call 911. Poison Control: 1-800-222-1222.