Male pattern baldness, also known as androgenetic alopecia, is a common form of hair loss in men. It typically begins with a receding hairline and thinning at the crown of the head. This condition is influenced by genetics and hormones, particularly dihydrotestosterone (DHT), which affects hair follicles. The progression of male pattern baldness can vary among individuals. Some may experience significant hair loss by their twenties, while others may retain a full head of hair into their forties or fifties. Treatments are available, including medications like minoxidil and finasteride, which can help slow down hair loss or promote regrowth.