Why have sperm counts more than halved in the past 40 years?
Today in Focus - A podcast by The Guardian
Dr Shanna Swan has spent more than 20 years examining how chemicals in plastics are causing our fertility to decline – and what we can do about it. Help support our independent journalism at <a href="https://www.theguardian.com/infocus">theguardian.com/infocus</a>
