Toxoplasmosis is an infection that can cause a miscarriage or brain damage in the fetus.
According to microbiologist J.P.Dubey, an expert in toxoplasmosis, "The possibility of transmission to human beings touching or caring for indoor cats is minimal to nonexistent. Pregnant women need not dispose of a beloved indoor cat, because an indoor cat on a commercial diet does not become infected with toxoplasmosis."
A minor danger lies in the possibility that the cat became infected before becoming an indoor cat. Even so, it is improbable that the cat feces will carry toxoplasmosis cysts more than 35 days after the initial infection. A healthy indoor cat will not become infected with toxoplasmosis unless the cat has access to infected feces, infected meat, infected prey, or infected raw milk. The indoor cat who eats a commercial cat food and uses only his own litter box, should not become infected.