Penis Growth: Is Your Development Normal? - Urology

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Hello, doctor: I would like to ask why my penis doesn't seem to grow much? It measures 7 cm when flaccid and 13 to 15 cm when erect.
My voice has changed, and I have almost fully developed facial hair, pubic hair, and underarm hair.
Why is it that only my penis hasn't grown much? My brother and father both have larger sizes (13 cm when flaccid).
I want to know what might be causing this, as all my other secondary sexual characteristics seem normal.
Is there a problem with the development of my penis, or is this considered normal?

ANDY, 10~19 year old female. Ask Date: 2016/04/18

Dr. Li Xinyi reply Urology


Puberty has ended.
It sounds normal and there are no issues.

Reply Date: 2016/04/18

More Info


It's completely normal to have concerns about penis growth and development during puberty. The process of sexual maturation varies significantly among individuals, and many factors can influence the timing and extent of growth in different areas of the body.

Firstly, it's important to understand that puberty is a complex process that typically begins between the ages of 9 and 14 for boys and can last until the late teens or early twenties. During this time, various physical changes occur, including the growth of body hair, changes in voice, and the development of the genitalia. The growth of the penis and testicles is usually one of the last changes to occur during puberty, and it can happen at different rates for different individuals.

In your case, you mentioned that your penis measures 7 cm when flaccid and between 13 to 15 cm when erect. These measurements are within the normal range for adult males. According to various studies, the average erect penis size is typically around 12 to 16 cm, so your measurements are quite typical. It's also worth noting that genetics play a significant role in determining penis size, and it's not uncommon for boys to feel self-conscious about their size, especially when comparing themselves to peers or family members.

The development of secondary sexual characteristics, such as voice deepening, facial hair, and body hair, can occur at different times and rates compared to genital growth. It's possible for some boys to experience significant changes in these areas while their penis size remains relatively stable for a period. This discrepancy can lead to feelings of concern, but it doesn't necessarily indicate a problem with development.

If you are experiencing normal secondary sexual characteristics, such as the growth of pubic hair and facial hair, it is likely that your body is progressing through puberty as expected. The penis may continue to grow and develop until the end of puberty, which can be as late as your early twenties. Therefore, there is still a possibility that you may experience further growth.

If you have concerns about your development or if you feel that your growth is significantly delayed compared to your peers, it may be beneficial to consult a healthcare professional. They can provide a thorough evaluation and reassurance, as well as check for any underlying health issues that might be affecting your growth.

In summary, penis growth during puberty varies widely among individuals, and many factors, including genetics and hormonal changes, influence this process. Your current size is within the normal range, and there is still potential for growth as you continue through puberty. If you have ongoing concerns, seeking advice from a medical professional can provide clarity and peace of mind. Remember, everyone's body develops at its own pace, and it's essential to focus on overall health and well-being rather than comparisons with others.

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