The CDC and others recommend that women should not change cat litter or come into contact with cat feces while pregnant. Cat feces may contain Toxoplasma gondii. Exposure may place mother and especially the fetus at risk of toxoplasmosis. Pregnant women may still have cats in the home, but they should not contact cat feces in any way. Clostridium tetani, which causes tetanus, may be found in cat feces; however, pregnant women are at no increased risk of tetanus because of it. The concern is toxoplasmosis, which can be transmitted to the fetus and cause terrible congenital symptoms or miscarriage.