Key Takeaways Oligospermia, or low sperm count, is a male fertility issue diagnosed when sperm concentration falls below 15 million sperm/mL. Depending on the sperm count levels, it can be categorised into mild, moderate, and severe oligospermia. Caused by varicocele, infections, ejaculation problems, medications, lifestyle factors, hormonal imbalances, and genetic or traumatic causes. Diagnosis involves […]