Leasha, if I were in your position I would find out. Reason I say that was I did want to find out by my DH didn't, but I thought like you 'well I'm going to be physically experiencing the pregnancy,and maybe this is something important to [him]...'. DH wanted the surprise, so I didn't find out cause it meant something to him. I don't think knowing would mean your impending pg would lose any of its spark, and if it is something that you aren't really passionate about, I would say go with what your DP wants. After all, having kids with someone is all about sharing this sort of thing

good luck in deciding what to do