Male fertility refers to a man's ability to produce healthy sperm that can successfully fertilize an egg. Factors influencing male fertility include sperm count, motility (the ability of sperm to move), and morphology (the shape and structure of sperm). A normal sperm count is typically considered to be at least 15 million sperm per milliliter of semen. Various lifestyle choices and health conditions can impact male fertility. Factors such as age, diet, exercise, smoking, and exposure to environmental toxins can affect sperm production and quality. Additionally, medical conditions like diabetes or hormonal imbalances may also play a role in male fertility issues.