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Testicular descent: when to interfere?
Summary
Spontaneous descent of undescended testes is linked to hormone surges. Treatment for undescended testes should begin at 4 months for full-term infants and 6 months for premature infants.
Area of Science:
- Pediatric Endocrinology
- Urology
- Neonatology
Background:
- Undescended testes occur in up to 70% of newborns.
- Factors influencing spontaneous testicular descent remain debated.
Purpose of the Study:
- To investigate factors contributing to spontaneous descent of palpable undescended testes.
- To determine the relationship between testicular descent and gestational age, birth weight, laterality, and hormone levels (FSH, LH, testosterone).
Main Methods:
- Follow-up of 84 newborns with 126 palpable undescended testes for one year.
- Monitoring occurrence and timing of testicular descent.
- Assessing levels of Follicle-Stimulating Hormone (FSH), Luteinizing Hormone (LH), and testosterone.
Main Results:
- 46% of testes (58/126) descended spontaneously between 3-6 months.
- Spontaneous descent was higher in premature infants (63%) versus full-term (43%).
- A postnatal surge of LH and testosterone at 2-3 months correlated with descent; absent/low surges were seen in cases of permanent undescended testes.
Conclusions:
- Spontaneous descent of palpable undescended testes is strongly associated with LH and testosterone surges.
- Therapeutic intervention for undescended testes should be initiated at 4 months for full-term infants and 6 months for preterm infants.