Hypogonadism

Hypogonadism is an endocrine disorder in which the gonads—testes in males and ovaries in females—fail to produce adequate sex hormones such as testosterone or estrogen. It may arise before, during, or after puberty and is broadly classified into primary (gonadal failure) and central or secondary (hypothalamic–pituitary dysfunction) types. Common causes include genetic syndromes (like Klinefelter or Turner syndrome), autoimmune diseases, infections, tumors, radiation, surgery, or chronic illnesses affecting the gonads or pituitary gland.

In children, hypogonadism typically presents with delayed or absent puberty, poor growth, lack of breast development in girls, and deficient genital or secondary sexual character development in boys. Adults may notice amenorrhea, hot flashes, low libido, erectile dysfunction, loss of body hair, reduced muscle mass, fatigue, and mood changes. Diagnosis involves detailed history, physical examination, and blood tests to measure sex hormones, LH, FSH, and other pituitary hormones, sometimes supported by imaging such as MRI or ultrasound.

Treatment usually centers on hormone replacement therapy—testosterone for males and estrogen with or without progesterone for females—to restore normal puberty, sexual function, and bone health, while addressing the underlying cause when possible. With timely and appropriate management, most patients can achieve improved quality of life and, in select cases, restored fertility.