Average Puberty

Puberty is defined as the process of physical characteristic changes that occur and in turn mature a child’s body into an adult, capable of sexual reproduction, and enabling fertilization. Initiated by hormone signals from the brain to the gonads, this process can vary from individual to individual by age, gender, and other parameters. This page intends to give accurate information regarding the average puberty occurrences within males and females, including information such as the first ejaculation in males and the first period in females.

Average Puberty

Average Male Puberty

The onset of Male Puberty varies slightly within young males but typically occurs at an average age. This event is usually characterized by the First Ejaculation of the individual. The table below illustrates the Average Age of Puberty in boys:

Average Age of Puberty (boys):13 years old

It has been observed over time that the average age of puberty in boys has gone from roughly 16 years old, down to the 13 years old we have today. This is likely due to chemicals and hormones present in modern-day fast foods and nutrition sources.

Body Hair

Body hair is largely sensitive to varying levels of the hormone testosterone. Rising levels of this androgen during puberty cause ‘vellus’ (thin, barely visible hairs) to turn into ‘terminal’ (much more visible) hair all over the body. There is definitely a large difference in terminal hairs across the body when comparing men to women; as such it can be stated that males tend to have more terminal hairs than females.

Average Age of Pubic Hair (boys):12 years old

Penis and Testicle Size

A change in testicular size is typically one of the first physical signs of puberty in boys. From birth to the onset of puberty the testicles grow to a very minor degree and are typically on average the size illustrated as follows.

Testicle Size (before puberty):2-3cm (length)
1.5-2cm (width)

Upon the onset of puberty, the size of testicles changes drastically and typically results in a testicular volume as illustrated.

Final Testicle Volume (during/after puberty):18-20 cubic cm

Related Article: Average Testicle Size

Average Female Puberty

The onset of Female Puberty varies slightly within young females, similar to males, but typically occurs at an average age. This event is usually characterized by the First Period (onset of menstruation) of the individual. The table below illustrates the Average Age of Puberty in girls:

Average Age of Puberty (girls):12-13 years old

Similar to boys, the Average Age of Puberty for girls has been decreasing over time as well, from a mean age of 15, down to the 12-13 years old we see today. This is likely for the same nutrition-related reasons regarding excess hormones in modern-day diets.

Body Hair

As stated above, women tend to develop less terminal hair than men.

Average Age of Pubic Hair (girls):11 years old
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Jessica J
About Jessica J 115 Articles
Written & Reviewed by Jessica J, M. D. Dermatology.

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