The correlation between GnRH stimulation testing and obstetric ultrasonographic parameters in precocious puberty

Area of Science:

• Pediatric Endocrinology
• Reproductive Medicine
• Diagnostic Imaging

Background:

• Central precocious puberty (CPP) involves early onset of puberty, requiring accurate diagnostic tools.
• Evaluating early puberty signs necessitates reliable markers for timely intervention.

Purpose of the Study:

• To establish dependable cut-off values for basal gonadotropins.
• To correlate obstetric ultrasound findings with the Gonadotropin-Releasing Hormone (GnRH) stimulation test in diagnosing CPP.

Main Methods:

• Assessed 100 girls with early puberty signs using GnRH stimulation tests.
• Utilized receiver operating curves (ROCs) to evaluate diagnostic accuracy of hormone levels and ultrasound parameters.
• Measured area under the curve (AUC) for sensitivity and specificity analysis.

Main Results:

• Luteinizing hormone (LH) levels, peak LH/FSH ratio, fundal/cervical ratio, uterus length, and ovarian volume are significant predictors of CPP.
• Established high specificity for cut-off levels of basal LH and peak LH/FSH ratio.
• Demonstrated that obstetric ultrasound parameters are reliable diagnostic indicators for CPP.

Conclusions:

• Basal and stimulated gonadotropin levels, particularly LH and LH/FSH ratio, are crucial for CPP diagnosis.
• Ultrasonographic measurements of uterine and ovarian morphology provide valuable, reliable data for diagnosing CPP.
• Integrated assessment of hormonal and ultrasound markers enhances diagnostic accuracy for central precocious puberty.