Mine has been in the living room for three weeks. My Basset Hound doesn't like wheels so we put it up for him to get used to it. I'm not superstitious about it at all, I bought things for the baby before my 12 week scan too. If something is going to happen, it will happen regardless.
I also found it really helpful to practice collapsing it, putting the carrycot and car seat on etc. We have fitted the car seat in the car too. Makes me feel more confident, I didn't want to take it out for the first time with the baby in and have trouble with it. That happened to a friend of mine, she took her pram out for the first time and couldn't collapse it when she got home, she had to leave it outside until her DH came home from work. Trouble is she had to keep an eye on it out the window in case someone tried to pinch it or it started to rain!
x