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Clinical Implications of Minipuberty
Anders Juul1,2,3
1Department of Growth and Reproduction, Copenhagen University Hospital-Rigshospitalet, Copenhagen.
The New England Journal of Medicine
|March 25, 2026
Summary
Minipuberty is a brief, active phase of the hypothalamic-pituitary-gonadal (HPG) axis in infants. This early hormonal activity is crucial for diagnosing endocrine disorders and predicting future reproductive health.
Area of Science:
- Pediatric Endocrinology
- Reproductive Medicine
- Developmental Biology
Background:
- Minipuberty describes a transient period of elevated hypothalamic-pituitary-gonadal (HPG) axis activity in early infancy.
- This phase is characterized by high levels of gonadotropins (follicle-stimulating hormone and luteinizing hormone) and gonadal steroids.
Purpose of the Study:
- To highlight the significance of minipuberty as a diagnostic window for endocrine and sexual differentiation disorders.
- To emphasize its role in guiding therapeutic interventions and predicting adult reproductive capacity.
Main Methods:
- The study reviews existing literature on the hormonal profiles during early postnatal life.
- Analysis focuses on the HPG axis activity in infant boys and girls.
Main Results:
- Infant boys exhibit high follicle-stimulating hormone, luteinizing hormone, testosterone, insulin-like 3, inhibin B, and antimüllerian hormone.
- Infant girls show adult levels of follicle-stimulating hormone and luteinizing hormone during this period.
- The HPG axis is subsequently silenced until puberty onset.
Conclusions:
- Minipuberty serves as a critical early diagnostic period for conditions like congenital hypogonadotropic hypogonadism.
- Understanding minipuberty aids in optimizing gonadotropin therapy dosing.
- This early hormonal state is a predictor of adult reproductive potential.
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