I really enjoyed this post by Melissa at Permission to Live. I do love her fresh, invigorating thoughts, despite many differences in background, upbringing and religious beliefs.
I have discussed birth control in the Orthodox Jewish community before, though I can't remember right now in which post exactly. In a nutshell, it is encouraged to have a large family, and children are seen as something more important than numerous possessions or unlimited freedom to pursue personal interests. When opting for rabbinical counsel regarding birth control, there are few instances when it is acceptable, and fewer still when it is recommended.
But there's balance, and this is very important. There really are some situations which are radical. There are special circumstances of physical and/or emotional health (though I admit, those are sometimes stretched to an unbelievable extent, such as "my emotional health does not permit me to have children unless each one has a room of his own").
I know of a woman who is deeply religious, devoted to her children, and who strongly desired to have a large family. Indeed, she does have a large family, though not as large as she could have had, had she not used birth control due to her extraordinarily difficult pregnancies, during which she is basically incapable of functioning normally, and thus has to rely heavily on help. So each times she struggles, seeks counsel, tries to walk in truth of what is best for everyone involved.
See, this is one of the many reasons I'm so grateful for being a Jew. Our laws are so numerous and complex, and things are rarely black and white. It's impossible to say that if you are using birth control, you are selfish, lazy, and lacking faith, and if you don't, you are a crazy religious fanatic who looks down upon everyone else. Life is many-faced and so fascinating and wondrous.
Because it's such a complicated issue, it's good for every couple to have a rabbi to whom they can turn, perhaps not on a regular basis, but in troubling circumstances such as when there are genuine problems with the mother's health or other special reasons. It's impossible to write a neat list of who should and who shouldn't have more children, and in which circumstances. That's why we talk to a rabbi. Not to have him think instead of us, but to guide us into looking with (hopefully) more precision at our personal wishes vs. what G-d wants.
Also, an important thing to keep in mind is that a large family isn't, or at least shouldn't be, a cultural statement. Children aren't trophies or achievments, they are ours not as our possessions, but in the sense of belonging to us as we belong to them, and as we all together, as a family, belong to one Maker who placed us all on this earth and blessed us by bonding us for life.