Male infertility refers to the inability of a man to contribute to conception due to issues with sperm production or function. Factors affecting male fertility can include low sperm count, poor sperm motility, or abnormal sperm shape. Lifestyle choices, medical conditions, and environmental factors can all play a role in these issues. Diagnosis typically involves a semen analysis to assess sperm health. Treatment options may include lifestyle changes, medication, or assisted reproductive technologies like in vitro fertilization (IVF). Understanding the underlying causes is essential for effective management and improving the chances of conception.