Causes of male infertility include:
- Obstructions to the passages of sperm
- Low sperm count
- Impotence
- Hormonal imbalance
Sperm are produced in the testicles and spend 2 to 10 days passing through the epididymis, where they mature and exit into a larger tube called the vas deferens. The vas deferens will empty the sperm into the ejaculatory duct, where they are mixed with seminal fluid from the seminal vesicles and the prostate gland.
During an ejaculation, muscular contractions will force the semen into the urethra and exit the penis. Absences or blockages of these tubes can cause male infertility. The cause of these blockages can be due to injury or vasectomy.
