Related Experiment Video
Updated: Aug 15, 2026

Assessment of Sexual Behavior of Male Mice
Published on: March 5, 2020
[Study on the sexual development of adolescent male]
Ling Gai1, Dan-Tong Yang, Hui-Qing Sun
1Institute for Family Planning of Shangdong Province, Jinan, Shandong 250002, China.
Objectives:
The investigation of the testicular volume, the penis length and the T, FSH, LH, PRL levels in serum were taken in 289 adolescent males to provide the valuable data for andrology.
Methods:
The adolescent males were grouped according to their age. The testicular volume was measured with testicular model and the T, FSH, LH, PRL levels in serum were determined by immunoenzymetric assay.
Results:
The male sexual development was rapid from age 11 to 16 and close to that of adult at age 18. Serum PRL of adolescent males was higher than that of adult males.
Conclusions:
The age 11 to 16 is a period of rapid growth in sexual maturation. PRL may play an important role in sexual maturation.
Related Concept Videos
The Y Chromosome Determines Maleness
Evolution
Around 300 million years ago, the two sex chromosomes diverged from two identical autosomal chromosomes. Over time, the Y chromosome has lost most of its genes, shrinking in size. Today,...
Development of the Sexual Organs in the Embryo and Fetus
Near the gonadal ridges, two duct systems are present: the mesonephric ducts (Wolffian ducts) and paramesonephric ducts (Müllerian ducts). These ducts form the basis for the male...
Psychosexual Stages of Personality: Latency
The latency period is not considered...
Psychosexual Stages of Personality: Genital
Psychosexual Theory of Development
The Five Stages of Psychosexual Development
Freud's psychosexual...
Erikson's Theory on Socioemotional Development during Adolescence

