Two women wrote in today to say they wanted to give up their cats because they were pregnant. One I think, used her pregnancy as an excuse. The other was really upset because her doctor had told her that it was possible that if she inhaled cat hair it might go into the foetus.
I'm not sure if she misunderstood her doctor or why the doctor told her that because when I called a doctor friend she explained that it's medically impossible for that to happen. Hair is already trapped in the nose she said, and is stopped at another level. Plus the nutrients from the babies need to go through the blood stream - meaning that the hair would need to go into the blood, which isn't possible at all.
We do find quite a few people say they give up their cats just to be safe, or the doctor will tell them to do it just to be safe. I met an American lady once who told me that in the US now, if you told pregnant ladies to give up their cats, you'd be laughed out of the clinic.
My mother had cats when she was pregnant with me and never contemplated giving them up. I was born a nice healthy, chubby baby.