Lovinglife, thanks for mentioning the breastfeeding in there. I have the same feelings as all of you have expressed about fears of pain, pregnancy, childbirth. I figured when I was in that position I would deal with it, as legions of women have (screaming, loudly complaining, whatever).
But breastfeeding is one thing I've really dreaded. For me it sounds like torture, because I'm really sensitive in that region. I take after my mom in that way, and she never was able to pull it off. I know there's tons of people out there who are saying, "I formula fed and my 3-year old is fine!" I read those comments all the time. But coincidently I've had a serious immune system-related disease (now in remission), and my brother has chronic, serious allergies. Hmmmm. Who knows if it's from not being breastfed, but it's a possiblity.
So that would leave me with either tremendous guilt over the issue if I couldn't handle it, possibly a child with a lowered immune system, or, months of agony if I do figure it out and am able to handle it somehow. Is that reason enough to not want to bear children? Possibly not, but it's on my list.