Which endocrine gland(s) are responsible for the changes associated with puberty?

The pituitary gland and the gonads (testes in males and ovaries in females) are the primary endocrine glands responsible for the changes associated with puberty. The pituitary gland secretes hormones that stimulate the gonads to produce sex hormones (such as testosterone in males and estrogen in females), which in turn trigger the physical and reproductive changes that occur during puberty.