Does Stress Affect Chance of Pregnancy?

Hi all,
I have been so busy these days that I have been working long hours and expect that it will continue for a while, I wonder if stress have any direct link to reducing the chance of becoming pregnant? I suspect that it does and I am seriously thinking about reducing my workload... I think that I should start re-prioritizing so that family is always first priority..
Any advice and suggestions?
Thanks much
Joanna