I thought, before my little guy was born that when he was 1 year old, I'd wean him and then TTC the next (and last) baby. Part of my reasoning is my age - turning 37 in May. I count myself lucky my son was born 100% healthy/perfect (it was a huge relief, actually...)
I'm rethinking things now...I think I will let my son self-wean (within reason) and if I get PG, fine...if not, that's ok, too...?
If I was younger (ie: a lot) I would not be concerned with making another baby sooner, rather than later.
What started my "brain thinkins" was a thread on this forum - someone said something about not denying the baby you already have what he/she deserves in order to make another baby. Does that make sense? Like your/my relationship with the babies we have now are important and special?
All of this is weighing rather heavily on my mind - not to mention the fact I'm not sure I can handle two children under the age of 2 (I also have a 7 year old step son!)