no, I don't. I have a cat book and I think it did mention something about it but I'll have to dig out my book. Let me see if I can find it and get back to you. Why do you ask, is your cat pregnant or going to be?
i ask because i adopted a very pregnant cat from a woman who could no longer care for her, and this morning i saw some blood, and now there's some mucus stuff coming out. ..... i guess i'm just very anxious for the pretty furballs