I've always been 100% don't find out. I know some people have their reasons (for example, I completely understand why Skybie wants to find out), but it just doesn't make sense to me.

With Ianto, had we found out, I would've been a disappointed. I always wanted a girl first. When he was born and I was told he was a boy, my mind just went "well of course he is!" even though I'd spent my pregnancy calling him "her".

With Amelia, I was more concerned about whether I was right about her being a girl than I was about her actually being one