Radiation or some hazardous chemicals can cause fertility problems in both men and women. And they can cause birth defects in children whose parents are exposed to them. Some chemicals reduce sperm count or cause misshapen sperm that don't move well.¹

But there are regulations to prevent people from being exposed to hazardous chemicals.

This information is for educational use only, and is not a substitute for prompt professional medical advice. Readers should always consult a physician or other professional for advice and treatment. ©BMJ Publishing Group Limited 2008. All rights reserved.