- Pre-testicular causes
- They affect the production of sperm and are relate to unhealthy habits, including alcohol drinking and street drug consumption.
- Testicular causes
- Testicular diseases such as hydrocele or varicocele.
- Post-testicular causes
- They are related to ejaculation problems, which can be due to a blockage in the vasa deferentia or infections.
Last Update: 02/05/2018