When does your penis stop growing?
When does it start growing?
These are the questions that many adolescent males start asking as they notice their bodies going through many developmental changes.
As one’s body grows, one of the primary concerns about physical maturation tends to be penis size.
It’s a personal concern that often comes with feelings of uncertainty, or even insecurity, especially in a society that places so much importance on size.
Penile size concerns don’t necessarily diminish with age.
Adult males might also find themselves wondering when the penis stops growing, hoping that like the nose or ears, it might continue to lengthen with age.
Unfortunately, the penis does not get bigger once you’re over the hill. In fact, there’s even the chance that as one ages, the penis can shrink.
If adult males aren’t asking about when their penises stop growing, it’s because they’ve had a decade or a few to get used to the fact that their penises finished growing long ago, at least in the way that nature intended.
(More on post-adolescence penis growth through enlargement at the end of the article.)
But knowing about the different stages of penile growth and development is important, regardless of age, since the more one knows and gets acquainted with the workings of the penis, the happier that special relationship can be.
When the Penis Stops Growing
So, when does your penis stop growing?
In the natural order of genital development, the human male penis stops growing when puberty ends.
The average male goes through puberty during the ages of 13 and 18, although the penis may not be done growing fully until age 21.
Of course, since males go through puberty at different stages in their lives, the exact age when the penis stops growing differs for each male.
This is true for every male—except the ones who try our stem cell penis enlargement product!
Prenatal and Postnatal Penile Growth
When the penis starts to grow is while the male is still a fetus. According to a study published in the Journal of Pediatrics, penile growth in the prenatal stages begins in 14 weeks gestation.
Once the growth begins, it continues linearly.
At the time of full-term, the stretched penile length of the infant is typically around 3.5 cm with a diameter of 1.1 cm.
Postnatal penile growth depends largely on the levels of testosterone, which affect penile size and growth during the postnatal stage.
The postnatal stage encompasses any time after birth up to three years of age.
In a study published in the European Journal of Endocrinology, researchers found that in postnatal development, there was a significant correlation between the levels of endogenous testosterone and penile size and growth rate.
According to the researchers, there was a significant association between penile growth and the amount of serum testosterone levels at three months of age.
The first three months of age was also when the highest growth rates were found to occur.
Penile Development and Puberty
The age at which the penis starts to grow towards its eventual adult size is during puberty, but the process is gradual and more complicated than a simple on-off switch.
The first stages of pubertal genital development manifest with the testicles.
Young males, anywhere between as early as 8 to 14 years, will notice the first signs of puberty in the enlargement of the testicles.
Other signs include reddening and changes in the texture of the scrotum.
During this time, there may be signs of sparse pubic hair growth.
Approximately one year after the testicular enlargement begins, the penis begins to grow in length. The scrotum will also continue to grow.
Pubic hair becomes coarser, darker, and slightly curled.
In the next stage of penile development, the penis continues to grow in length and additionally in girth. The glans, or the head of the penis, also develops during this phase.
The scrotum continues to enlarge and darken.
The texture and appearance of the pubic hair will resemble that of an adult’s, but the hair will not have spread to the thighs at this point.
By the time the male is an adult, the penis and scrotum are done growing.
Typically, an adult male will have his fully formed penis size by the time he is 21 years old.
Pubic hair will have spread to the medial surface of the thighs at this stage.
An adult male cannot expect to see any further penis growth, and as he ages, he will discover that there are other penile issues that arise in later years, such as erectile dysfunction, penile shortening, and other issues with confidence and sexual appetite.
Methods to enlarge the penis post-puberty have been shown to be largely ineffective, with the exception of the stem cell penile enlargement method.
Timeline of Penis Growth
A timeline of penile development shows the growth process at different stages of the male’s lifetime.
Prenatal penile growth: signs of penile growth begin to show at 14-weeks gestation; growth continues linearly until full term
Postnatal penile growth: Between birth and 3 months of age, levels of serum testosterone play a significant role in the rate and size of penile growth
Infancy to preadolescence: penis is childhood size and proportion; no pubic hair, but only fine body hair
Beginning of puberty: 8-14 years old; most commonly, males begin puberty around age 12
1st sign of pubertal development: testicular enlargement, reddening of scrotum, changes to genital texture
13-14 years old: first signs of pubic hair
1 year after beginning of puberty: lengthening of the penis
Further penile growth: continued lengthening of the penis; thickening of penis diameter/ girth
Development of the glans (penis head)
14 years old: nocturnal emissions, more familiarly known as “wet dreams”
15 years old: other signs of puberty include hair growth under arms, on the face; deepening of the voice; possible acne
Ages 16-21: end of puberty, penile growth is complete.
Many males will have reached their adult penile size by the time they are 16, but it is possible for development to continue as late as 18 or even 21.
Pubertal and Penile Development Across Races and Ethnicities
Since penile development and growth occurs most significantly during adolescence, there is a possibility that penile growth happens at different ages for males of different racial groups.
The racial compositions of the tested group were non-Hispanic black males, non-Hispanic white males, and Mexican American males.
The average ages for the onset of pubic hair development across racial groups were 11.2 years for non-Hispanic black males, 12.0 years for non-Hispanic white males, and 12.3 years for Mexican American males.
The average ages for the beginnings of genital development were 9.2 years for non-Hispanic black males, 10.0 years for non-Hispanic white males, and 10.3 years for Mexican American males.
Full genital development, including penile length and growth enlargement and the development of the glans, was distributed in slightly different order across racial groups: 15 years for non-Hispanic black males, 15.7 for Mexican American males, and 16.0 years for non-Hispanic white males.
On average, penile development had reached full maturation for males across all racial groups by the age of 16.5 years.
Pubertal Development of Rural Versus Urban Adolescents
The penile and pubertal development of males across racial groups has tended to focus on reports of males in urban areas.
To examine if environmental factors affected the stages of sexual maturation between racial groups, one study looked at the data for rural youth and compared these numbers to the findings of other groups that had focused on urban youth.
The researchers found that while the onset of puberty and genital development in rural youth was consistent with the date for urban youth—with the onset being earliest for black males, followed by white and Latino males—in the later stages of puberty, the order reversed and white males showed more advanced sexual maturation, followed by black and latino males.
Between the ages of 11-13, black males demonstrated more advanced pubertal development, but between the ages of 13-16, white males exhibited signs of more advanced pubertal development.
Are sexual maturation and penile enlargement occurring earlier?
There are several studies that have looked at whether pubertal development, which includes penile growth, is occurring at an earlier age for the youth of today.
As of yet, the area requires further investigation, which can be evidenced by the conflicting findings of various studies.
Some studies claim that pubertal development is not occurring earlier, while others claim that it is indeed occurring at an earlier age.
Researchers at Wright State University, Pennsylvania State University, and the University of Minnesota looked at data from 1966 and 1994 and compared the ages for the onset and sexual maturation of adolescent males across three racial groups: black, white, and latino.
The researchers concluded that there was no significant evidence suggesting males of any racial group were reaching the age of onset or sexual maturation any earlier than males from thirty years ago.
On the other hand, other studies, such as the one conducted by Dr. Herman-Giddens of the University of North Carolina School of Public Health, suggests that data trends show that pubertal development is, in fact, occurring at a younger age.
How much can your penis grow in a short period of time?
The rate and amount that a penis can grow in a given period of time is specific to each individual. Penile growth depends on androgenic steroids, particularly testosterone.
As the male begins to go through the stages of puberty, the body secretes androgens in addition to thyroid and growth hormones.
The amount that the penis grows during these growth spurts varies with each male.
After puberty, the male penis does not naturally grow at any other time.
As of yet, the only reliable method of penile enlargement is the stem cell enlargement method.
Other methods—pills, supplements, extenders, pumps, and weights—have been proven repeatedly to have little to no effect on penile enlargement.
It is only by tapping into the body’s natural DNA structures and using stem cells to replicate penile growth that the adult male can enlarge his penis.
Is my penis normal?
Since the ages for the onset and peak of penile development and the rate of penile growth vary across racial groups and between individuals, it is difficult to say what is considered normal for these different stages of penile development.
Young males going through adolescence will not know if they have normal-sized penises until they have finished with puberty.
For the average adult male, penile sizes are 9.16 cm (3.61 inches) flaccid length, 13.24 cm (5.21 inches) stretched length, 13.12 cm (5.17 inches) erect length, and 11.66 cm (4.59 inches) erect girth.
Researchers at King’s College London compared the data of 15,521 men and their penis sizes to come up with an average size for the adult male.
The study spanned data from several countries, and the age of the participants range anywhere from 16 to 90 years.
Some 90% of men have erect penis sizes that fall in the average range of 4 and 6.3 inches.
Tracking Penis Growth
Pubertal and penile development can be tracked according to the standardized Tanner Stages.
Young males going through puberty may notice visible signs of genital development, even before the actual penis begins to grow.
The onset of puberty is initially notable with the enlargement of the testicles, which will also begin to deepen in color and appear redder.
During puberty, penis growth can often be tracked by the naked eye.
It is also possible to track penile growth through measurements.
For adult males, tracking penis growth is only purposeful if one has begun a penile enlargement program.
It should be noted that most methods of penis enlargement—pills, pumps, extenders, weights, supplements, creams—do NOT work.
Many of these methods that claim the answer to penile enlargement are scams.
If you’ve decided to boost your confidence and take your penis size into own hands with the only method that has been proven to work
—our stem cell penile enlargement process—then tracking penis growth is an excellent way to measure the effectiveness of the program and gradually increase your confidence.
How to Measure and Track Penis Growth
The penis can be measured in varying stages: flaccid, stretched, and erect. Flaccid length is the length of the penis at room temperature.
The stretched length is the length of the penis when it is stretched out, holding the tip between the thumb and forefinger and measuring the length from the base to the tip.
The erect length is the length of the penis when it is fully erect.
Researchers use the flaccid, stretched and erect lengths for diverse reasons.
However, the flaccid and stretched lengths are not as useful when assessing one’s own penis size.
Flaccid penis lengths are only minimally useful considering nearly 79 percent of men have what are called “growers,” or penises that extend when becoming erect.
Stretched penis lengths can be somewhat more effective, but they can also exaggerate the size of the penis.
The data collected on the average size of the male penis found that the stretched length was often reported to be longer than the erect length.
This discrepancy can be explained by the fact that when the penis becomes erect through increased blood circulation, the penis not only extends in length but also in girth.
The stretched length does not account for the amount that the penis grows in girth when becoming erect.
The length of the erect penis is the key number when measuring the penis.
To measure the erect penis, you will need a tape measure and your erect penis:
Position the tape measure at the base of your penis shaft. Put the tape measure on top of the penis, that is, the side of the penis that you see when you look down.
Roll the tape measure out to the tip of the penis.
The number you see displayed will tell you your erect length.
Next position the tape measure at the base of your penis, but this time, wrap it around the shaft.
This measurement will give you the erect penis girth.
Enlarge Your Penis with Stem Cell Enlargement
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Using our stem cell product, derived from plant-based sources, you can see your penis grow and feel your confidence increase!
Even if you are at an age when your penis has stopped growing, it is not too late.
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