Yes the pains get worse with each subsequent baby.
After my 1st, I was up walking around, and didnt understand why I kept being offered panadol.
I found with the second, I didn't notice them either, but with the 3rd and 4th they were like being in full labour all over again - they only lasted the duration of a breastfeed, and only for a couple of days.
When you have that happy healthy baby in your arms, they are worth it.
[Edited on 24/04/2009]