Dictionary.com
Thesaurus.com

spermatotoxic

American  
[spur-mat-uh-tok-sik, spur-muh-tuh-] / spɜrˌmæt əˈtɒk sɪk, ˈspɜr mə tə- /
Also spermatoxic

adjective

  1. spermotoxic.