First Morning Voided Urinary Gonadotropin Measurements as an Alternative to the GnRH Test

• Aims: We studied whether first morning voided ( FMV) urinary gonadotropin measurements could be used as a noninvasive alternative to the GnRH test in the assessment of the hypothalamic-pituitary-gonadal function in children. Methods: In a single-center study, we compared FMV urinary gonadotropin concentrations with basal and GnRH-stimulated serum gonadotropin levels in 274 children and adolescents (78 girls, 196 boys) aged 5-17 years referred for growth and pubertal disorders. The concordance between FMV urinary gonadotropin concentrations and GnRH test results was assessed. Results: FMV urinary LH (U-LH), urinary FSH (U-FSH) and their ratios correlated well with the corresponding basal and GnRH-stimulated serum parameters (r = 0.66, p < 0.001). Receiver operating characteristic curve analyses using urinary and serum LH and FSH concentrations showed that FMV U-LH and U-LH/U-FSH performed equally well as the GnRH test in the differentiation of early puberty (Tanner stage 2) from prepuberty (Tanner stage 1) (area under the curve 0.768-0.890 vs. 0.712-0.858). FMV U-LH and U-LH/UFSH performed equally well as basal serum LH in predicting a pubertal GnRH test result (area under the curve 0.90-0.93). Conclusion: FMV U-LH determination can be used for the evaluation of pubertal development and its disorders, reducing the need for invasive GnRH stimulation tests. (C) 2016 S. Karger AG, Basel

Subject headings

MEDICIN OCH HÄLSOVETENSKAP  -- Klinisk medicin -- Pediatrik (hsv//swe)

MEDICAL AND HEALTH SCIENCES  -- Clinical Medicine -- Pediatrics (hsv//eng)

Keyword

Luteinizing hormone

Follicle-stimulating hormone

Gonadotropin-releasing hormone test

Hypothalamic-pituitary-gonadal function

Pubertal disorders

central precocious puberty

hormone-releasing hormone

follicle-stimulating-hormone

luteinizing-hormone

normal-children

immunofluorometric assays

lh-rh

serum

patterns

increase

mir a

1995

journal of clinical endocrinology & metabolism

v80

p1457

mir a

1994

pediatric research

v36

p221

Publication and Content Type

ref (subject category)

art (subject category)