Toxoplasma gondii is an key opportunistic protozoan.When the pathogen infects pregnant women,it can cause miscarriages,premature births,fetal anomalies,stillbirths,and birth defects,and it can also cause congenital toxoplasmosis.When the pathogen infects men,it can can cause reproductive disorders and infertility.This article reviews recent research on the mechanisms by which toxoplasmosis damages the testes,epididymis,and sperm.