How do I tell my parents the can't watch my baby?

Okay so I've know I'm pregnant for a couple weeks now. Obviously everybody in my family is excited. Especially my mom. My mom was even talking about turning my old bedroom into a baby room for when she keeps our child from time to time.

The problem, however, is I dont even want my child at my parents house at all really. They smoke indoors. They have 3 cats and 3 dogs. And they really don't take care of their house at all. I'm not talking about clutter. I'm talking about absolute filth, ceiling to floor. Like they don't let their animals out enough and they go in the house. It's honestly embarassing and disgusting. It took me a long time to even take my husband over there after we started dating because I was afraid it would change his opinion of me even though I live nothing like that.

I just dont get how they dont realize that their house is disgusting. I mean they literally like have cookouts and invite people over and it is so uncomfortable and I dread it. I dont think there is a single place in their house I feel comfortable sitting down long enough to eat food, but it's hard to want to eat if you see the kitchen. I love my parents so much and I feel like in some way it's disrespectful to tell them I dont want my baby in their house and I really dont want to hurt their feelings. Not to mention my parents argue fairly regularly, like sometimes twice a week and they yell and it's just not something I feel comfortable having my child around.

I dont want to have the conversation now but I also dont want to let my mom buy things for the baby for her house only to tell her no the baby will not be visiting there. This is a very stressful situation for me and I somewhat resent my parents for the shame and embarrassment I've felt my entire life because of the way they choose to live. So I have a feeling this is going to be a much deeper rooted conversation and I dont want to project all of my emotions while trying to have this conversation but bottom line my husband and I have already discussed it and the baby will not be staying at their house.