Hey guys, my name is Dr. Sam.
Now, I have been sometimes asked by my patients
whether there is a real condition called Micropenis
and what is the normal range for penis sizes?
If you keep watching I'll answer these questions,
plus talk about whether there is a connection
between fertility and penis size.
So - let's go!
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Classically, the Small Penis Syndrome or SPS
is the most common problem found in men.
This is when you have a man who has a normal-sized
penis, but feels fairly anxious about their size.
This is in contrast to a man who has a truly small penis,
which is called Micropenis.
A general definition of Micropenis is a size of less than
2.5 standard deviations from the mean.
What does that mean in normal language?
Well a penis size of less than 1.5 inches
or 4 centimeters when it's non erect
and when it's erect - less than 7 cm or 2 and 3/4 inches.
An actual Micropenis is quite rare.
It only affects 6 in 1000 men.
Penis size is actually really difficult to measure,
because there is so much variation within individuals.
Heat, exercise and anxiety all affect the size.
It shrinks?
Like a frightened turtle!
So what is the normal range of penis sizes?
Many studies have shown that
the non erect sizes range from 7 to 10cm or
2 and 3/4 inches to 4 inches in the non erect penis.
In the erect penis it can range from 13 to 16cm
or 5 to 6 and a quarter inches in those same studies.
Then there's also something called the
"Stretched Penile length".
Which is literally stretching the penis out and
measuring it and that gives you an
approximate estimate of the length of the penis
when it's erect.
Average penis size was fairly consistent
between different populations.
Although Korean penises were on average
smaller in a 2003 study.
However, mens' concerns about their penis size is
actually really common.
In a 2005 Canadian meta-analysis study they took
415 men and looked at their self perceptions
of their genitalia and what they found was
only half of men were satisfied with the length of their
non-erect penis, about 83% of men were
satisfied with their length of an erect penis.
And overall 73% of men were satisfied with a general
penis size and interestingly, men felt happier
about their general genitalia appearance
comparatively to woman.
Other interesting facts are that several studies have
shown that ninety percent so 90%
of women prefer a wide penis to a long one.
And the issue of attractiveness is
quite complex, where most data suggests
that woman are not so hung up on the size of
a man's penis compared to their external
grooming and a man's personality.
Right, so the big question - excuse me
(excuse the pun!)
But is penis size related to fertility?
Well a 2018 study looked at this question
and they found that there was a small association
between infertility and smaller penis size.
But you also have to remember that this
study was heavily criticized because
the design was very flawed.
I like to think in my mind about a rule of thirds.
When it comes to infertility and that is:
in a third of couples it's a male problem.
In a third of couples it's a female issue
and then in a third of couples we don't know
why it happens, there's no cause that's ever found.
Also if it's a male problem usually there's an issue with
the testes or a hormonal imbalance.
So, overall, good news fellas there is no such
Penis size is not a major factor
when it comes to fertility or potency!