Actually, used cat litter is dangerous for both pregnant women and cancer patients in real life. I've been both; a recent severe cancer survivor strictly instructed to remove any and all litter boxes from our house while I was going through chemo therapy and recovering from it, and I was instructed not to clean our cat litter while pregnant with my son.
The ammonia and bacteria in the used litter pose a very large health threat to people, and fetuses, with weak or developing immune systems.
Agreed. If the risk wasn't serious, no one would care to follow precautions in real life. I've never been pregnant, but everyone I know who has and had cats at the time did not touch the litter boxes, but had family members change it for them instead.
Different brands and materials for litter don't matter, because the risk comes from the cat feces itself. Apparently cats often carry a parasite in their intestines which is passed into their feces. If the pregnant woman comes in contact with it, or even breathes it in, she could develop toxoplasmosis which has severe effects on the developing fetus, resulting in misscarriage or stillbrith, as well as complications such as blindness and mental retardation.
So yes, she could wear gloves, and a mask for that matter as well, but what decent woman with her unborn child's best interest in mind would want to risk it?
Of course, sims are just sims, so it doesn't matter. But I was actually thrilled to see that my pregnant sims couldn't change litter, because it meant that Maxis paid attention for once. That's something theyve slacked off on lately, and I wasn't expecting them to care enough to remember that pregnant woman shouldn't change litter boxes.
But since no real risk is involved in the game, I suppose it's a personal preference. I imagine it would suck if your sim had no one else to change it for them, and had to deal with it stinking up their room score till they finally gave birth.