Complex sentence: In men, the mammary glands are also present in the body, but normally remain undeveloped because of the hormone testosterone, however, when male lactation occurs, it is considered a pathological symptom of a disorder of the pituitary gland.
Split into simpler sentences: In men, the mammary glands are also present in the body, but normally remain undeveloped because of the hormone testosterone. When male lactation occurs, it is considered a pathological symptom of a disorder of the pituitary gland.