When u are on AS or have been on AS and are trying to concieve a child...is there a possbility that the sperm that are still alive have been damaged or defective in any way??

I know that your sperm count goes very low during and after a cycle but there is still a psoosbiblty of pregnancy..... i wanted to know if there was any research on weather or not the exogenous test damges the sperm in any way shape or form.