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Related Experiment Video

Updated: Jun 23, 2026

Determination of Reproductive Competence by Confirming Pubertal Onset and Performing a Fertility Assay in Mice and Rats

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Published on: October 13, 2018

[Puberty in Icelandic boys.].

A V Thorsson, A Dagbjartsson, G I Palsson

|May 20, 2009

Summary

This summary is machine-generated.

The study found that the average age for the first signs of puberty in Icelandic boys is 11.89 years. Puberty timing and tempo in these boys align with findings from other Nordic and Western European countries.

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Dissection of Larval Zebrafish Gonadal Tissue

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Published on: April 26, 2017

Area of Science:

Pediatric endocrinology
Human growth and development
Public health

Context:

A cross-sectional study involving 2751 healthy Icelandic boys aged 6-16 years was conducted between 1983-1987.
This research was part of a larger growth study of 5526 Icelandic children.
Physical signs of puberty were assessed using standardized methods.

Purpose:

To determine the age of onset and tempo of puberty in Icelandic boys.
To compare the timing of pubertal development in Icelandic boys with international data.
To establish normative data for pubertal milestones in a specific population.

Summary:

The mean age for reaching testicular volume of 4 ml (T4), the first pubertal sign, was 11.89 years (SD 1.08).
The mean interval between T4 and testicular volume of 12 ml (T12) was 2.21 years.
The initial pubic hair growth (Tanner stage 2, PH2) occurred at a mean age of 12.74 years (SD 1.37), with the interval to Tanner stage 5 (PH5) being 2.43 years.

Impact:

Provides valuable normative data on pubertal timing for Icelandic boys.
Suggests similarities in pubertal development between Icelandic boys and those in other Nordic and Western European countries.
Contributes to the understanding of secular trends and geographical variations in human puberty.