Sperm are remarkable cells that have the role of delivering the male DNA to the egg during sexual reproduction.

Since their first discovery nearly 350 years ago, scientists are still trying to figure out how they work and why, in some cases, their dysfunction can lead to infertility.

In recent years, concern has been raised about how aspects of modern lifestyle may affect the quality and quantity of sperm and whether this will be a threat to our human existence.

Yet, sperm are rarely talked about in popular culture or in newspaper and magazine articles and male infertility remains somewhat of a taboo subject.

Join Professor Allan Pacey from the University of Sheffield’s Medical School, as he gives an overview of what we know about sperm, how they work, and why it’s important to talk about them.