What could be the problem if voice of a 15-year-old male has not yet broken?

1. Delayed puberty: This is the most common reason why a 15-year-old male's voice has not yet broken. Puberty is the process by which a child's body changes into that of an adult, and it typically begins between the ages of 9 and 14 in boys. However, some boys may experience delayed puberty, which can cause their voices to remain high-pitched for longer.

2. Hormonal imbalance: Another possible cause of a 15-year-old male's unchanged voice is a hormonal imbalance. The hormones testosterone and estrogen are responsible for the changes that occur during puberty, and an imbalance of these hormones can delay or prevent the voice from breaking.

3. Medical condition: In some cases, a medical condition may be the cause of a 15-year-old male's unchanged voice. These conditions can include:

* Klinefelter syndrome: A genetic condition in which a male is born with an extra X chromosome.

* Prader-Willi syndrome: A genetic condition that causes a variety of physical and behavioral problems, including delayed puberty.

* Hypothyroidism: A condition in which the thyroid gland does not produce enough thyroid hormone, which can lead to delayed puberty.

If you are concerned about your son's unchanged voice, it is important to see a doctor to rule out any underlying medical conditions.