Change the cat litter box?
The concern here is that you might contract a parasite that causes toxoplasmosis. This parasite is spread through contact with cat feces and raw or undercooked meats. Toxoplasmosis can cause severe damage to a fetus if it is contracted for the first time during pregnancy, especially the first trimester. However, most cat owners have already been exposed to this parasite at some point prior to the pregnancy and should be safe. It is recommended that you avoid changing the cat litter and if you must you should wear glove. Also, wear gloves when gardening in areas where cats might have defecated. Avoiding raw or undercooked meat is also recommended.