Highlights & Basics
- Delayed puberty is defined as the lack of pubertal signs at an age that is 2 to 2.5 standard deviations later than the population mean, typically by the age of 13 years in girls and 14 years in boys. It is more common in boys.
- Delayed puberty may be functional (constitutional delay, underlying chronic disease, malnutrition, excessive exercise) or organic, due to either a lack of serum gonadotropin production or action (hypogonadotropic hypogonadism), or gonadal insufficiency with elevated gonadotropins (hypergonadotropic hypogonadism).
- Many patients seek medical assistance because of slow growth rather than slow pubertal development.
- Careful assessment of height and pubertal stage is crucial for evaluation of the underlying cause.
- The distinction between organic gonadotropin deficiency and constitutional (self-limited) delay of puberty is not easy and is often resolved only with the passage of time.
Quick Reference
History & Exam
Key Factors
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Diagnostics Tests
Treatment Options
Definition
Epidemiology
Etiology
Pathophysiology
Images
Hypothalamo-pituitary-gonadal feedback loop. GnRH, gonadotropin-releasing hormone; FSH, follicle-stimulating hormone; LH, luteinizing hormone
Growth in a patient with constitutional delay in growth and puberty; X indicates bone age; arrow indicates age at onset of pubertal development
Prader orchidometer
Method of comparing testicular size using the Prader orchidometer
Tanner staging: A, genital rating standards in boys; B, pubic hair rating standards in boys; C, breast rating standards in girls; D, pubic hair rating standards in girls
Evaluation of a patient with delayed puberty. CDGP, constitutional delay of growth and puberty; DP, delayed puberty; FT4, free T4; GHD, GH deficiency; PRL, prolactin; TFT, thyroid function test
Citations
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Marshall WA, Tanner JM. Variations in pattern of pubertal changes in girls. Arch Dis Child. 1969 Jun;44(235):291-303.[Abstract][Full Text]
Marshall WA, Tanner JM. Variations in the pattern of pubertal changes in boys. Arch Dis Child. 1970 Feb;45(239):13-23.[Abstract][Full Text]
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