Hank briefs us on the news that a team of biologists has developed the first contraceptive for males that is totally effective, easily reversible and doesn't mess with your hormones!

Howcast - Learn the five most common causes of male infertility in this Howcast video.

In this video, Jonathan from the Institute of Human Anatomy discusses the components of semen, why it is necessary for sperm cells and reproduction, and the glands that produce it such as the prostate gland.

Microbiology: Motility Test