What is Micropenis?

It is a medical diagnosis where a baby boy's penis is structurally normal but significantly smaller than average (more than 2.5 standard deviations below the mean).

Why does it happen?

Penis growth in the womb depends on Testosterone in the 2nd and 3rd trimesters. Micropenis suggests a lack of testosterone production or action during that critical window.

• Hypopituitarism: The brain didn't signal the testicles.
• Hypogonadism: The testicles couldn't make testosterone.

Evaluation:

It is vital to check for other hormone deficiencies (like Growth Hormone or Cortisol) and genetic syndromes (like Prader-Willi or Kallmann Syndrome).

Treatment:

• Testosterone Therapy: A short course of testosterone (injections or cream) given in infancy can significantly increase penile size.
• Future: Most boys treated early have satisfactory sexual function as adults.