Delayed Puberty
What is Delayed puberty?
Delayed puberty happens when the physical changes of puberty begin later than expected. For boys, puberty typically starts between ages 9 and 14. For girls, it usually begins between ages 8 and 13. When these changes do not start by age 14 in boys or age 13 in girls, doctors consider it delayed puberty.
Puberty is controlled by hormones released by the brain and reproductive organs. These hormones trigger growth spurts, development of secondary sex characteristics, and changes in body composition. When hormone levels stay low past the expected age range, physical development slows or pauses.
Most cases of delayed puberty are simply constitutional delay, meaning the body follows a slower but normal timeline. Some teens develop later because their parents did too. However, hormone imbalances, chronic illnesses, or genetic conditions can also cause delayed puberty. Blood testing helps determine whether hormone levels are within expected ranges for age.
Symptoms
- No breast development by age 13 in girls
- No testicular enlargement by age 14 in boys
- No menstrual period by age 15 in girls
- Slower growth rate compared to peers
- Lack of body hair development in underarms and pubic area
- No voice deepening in boys by mid-teens
- Shorter height than age-matched peers
- Delayed facial hair growth in boys
- Low energy or fatigue compared to other teens
Some teens with delayed puberty feel fine physically but may experience emotional distress from developing later than friends. Early identification helps families understand whether the delay is temporary or requires treatment.
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Causes and risk factors
The most common cause of delayed puberty is constitutional delay of growth and puberty. This means the teen is healthy but developing on a slower timeline. It often runs in families. Other causes include chronic conditions like inflammatory bowel disease, celiac disease, or poorly controlled diabetes. Intense athletic training or eating disorders can also delay puberty by reducing body fat below levels needed for hormone production.
Hormone problems represent another category of causes. Low testosterone in boys can result from conditions affecting the testes or the pituitary gland. Similarly, girls may have low estrogen due to ovarian or pituitary issues. Genetic conditions like Turner syndrome in girls or Klinefelter syndrome in boys can affect hormone production. Thyroid disorders and excess stress hormones may also interfere with puberty timing.
How it's diagnosed
Doctors diagnose delayed puberty through physical examination, medical history, and blood testing. They check height, weight, and signs of puberty development. They ask about family patterns, nutrition, exercise habits, and any chronic health conditions. X-rays of the hand and wrist help assess bone age, which shows whether growth plates match chronological age.
Blood tests measure hormone levels to identify the cause of delay. Free testosterone testing helps evaluate puberty status in boys. Low levels may indicate delayed development. Additional tests may check luteinizing hormone, follicle-stimulating hormone, and thyroid function. Rite Aid offers free testosterone testing as an add-on to help identify hormone imbalances. Early testing provides clarity for families and guides treatment decisions when needed.
Treatment options
- Watchful waiting for constitutional delay, as puberty often begins naturally within 6 to 12 months
- Hormone therapy with testosterone for boys or estrogen for girls to start puberty when needed
- Treating underlying conditions like thyroid disorders or celiac disease
- Nutritional support to ensure adequate calorie and nutrient intake
- Adjusting intense athletic training schedules if contributing to delay
- Psychological support to address emotional concerns about delayed development
- Genetic counseling when chromosomal conditions are identified
- Regular follow-up to monitor growth and development progress
Need testing for Delayed puberty? Add it to your panel.
- Simple blood draw at your nearest lab
- Results in days, not weeks
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Frequently asked questions
Delayed puberty is diagnosed when puberty has not started by age 14 in boys or age 13 in girls. For boys, this means no testicular enlargement. For girls, it means no breast development. If a girl has not started her period by age 15, this is also considered delayed puberty even if other signs have appeared.
No, most cases are constitutional delay, which means the teen is healthy but developing on a slower timeline. This pattern often runs in families. However, blood testing and medical evaluation help rule out hormone imbalances or underlying health conditions. Early assessment provides peace of mind and identifies cases that may benefit from treatment.
Yes, blood tests measure hormone levels that control puberty. Free testosterone testing in boys helps identify low hormone levels that may indicate delayed development. Tests for luteinizing hormone, follicle-stimulating hormone, and thyroid function provide additional information. These tests help doctors determine whether the delay is temporary or caused by a hormone problem.
Constitutional delay is the most common cause in boys. Other causes include low testosterone due to testicular problems or pituitary gland issues. Chronic conditions like inflammatory bowel disease, intense athletic training, and genetic conditions like Klinefelter syndrome can also delay puberty. Nutritional deficiencies and thyroid disorders may interfere with normal development timing.
Girls most commonly experience constitutional delay, which is a family pattern of later development. Other causes include low estrogen from ovarian or pituitary problems. Turner syndrome, a genetic condition affecting girls, can cause delayed puberty. Eating disorders, intense athletic training, thyroid problems, and chronic illnesses may also delay development by affecting hormone production.
See a doctor if your teen shows no signs of puberty by age 14 for boys or age 13 for girls. Early evaluation helps identify whether the delay is temporary or requires treatment. Blood testing can provide answers quickly. If your teen has stopped progressing through puberty after it started, this also warrants medical evaluation.
Yes, treatment options depend on the underlying cause. Constitutional delay often requires only watchful waiting, as puberty usually begins naturally. When hormone levels are low, doctors may prescribe testosterone for boys or estrogen for girls to start development. Treating underlying conditions like thyroid disorders or nutritional deficiencies can also help puberty progress normally.
Most teens with constitutional delay eventually reach normal adult height. They grow for a longer period because their growth plates stay open later. However, some conditions causing delayed puberty can affect final height. Early evaluation and treatment when needed help ensure the best growth outcomes.
Constitutional delay typically does not affect fertility. Once puberty completes, reproductive function is normal. However, some conditions that cause delayed puberty, like genetic disorders or pituitary problems, may affect fertility. Early diagnosis and appropriate treatment help preserve reproductive health and address any concerns about future fertility.
Acknowledge their feelings about developing later than peers. Reassure them that most cases resolve naturally and that late bloomers catch up. Encourage open communication with their doctor about concerns. Consider counseling if the delay causes significant distress. Focus on their strengths and interests beyond physical development to support self-esteem during this time.