I also don't have MS but have polyneuropathy caused by having gullian barre syndrome 20years ago which causes demylenation of the nerve coverings. I have permenant damage same as you see in MS except mine repairs itself to some degree when I am in remission. The worse for me in the pain and pins and neddles and dead legs and arms followed by the pain related to that.
In my two pregnancies I have had so much relief from the polyneuropathy during pregnancy (and look forward to that part again if I ever get pregnant again) The birth's has been normal however I can't have an epidural (due to the past guillian barre not polyneuropathy)
With my last baby I was close to bedriden a few hours after her birth for the first few days. I guess it was all that work in labour catching up and sent my nerves into sometype of fizz but I was in tremendous pain. Then I hadn't been diagnosed correctly so they thought it was from post-polio syndrome or arthritis (I've never had polio either) but it did get better with NSAIDS. I didn't start getting problems with my nerves until my baby was 14months old and then it was worse then it was before pregnancy.
I haven't been on medication since trying to fall pregnant (now I have secondary infertility and its been almost 2yrs) as some of the medication has unknown effects on a developing baby.
I also work as a midwife and as of yet haven't come across a woman birthing with MS although we did cover it in our training. Having MS doesn't mean you need a caesarian although somewhere in my training I think I learnt you may feel contractions differently (or not at all depending on your level of deficet if any at all) In most cases I think pregnancy does improve the symptoms of MS. And I know there is a book about MS in pregnancy which might help.
msgirl your not been selfish having a baby. You have every right to have a family and having MS shouldn't stop that.
Oh and my Aunty's friend has MS. She had one child (I think she wanted more but decided on just the one) her daughter is now 10 (not sure when she was diagnosed with MS but it was before she had her daughter) I don't know her personally except our daughters have been to the same parties etc.
So been a mum (again I know its different) but one of my biggest challenges was BF (which I did for 2yrs) as holding my baby within minutes with my arm supporting her sent my arm dead and then I'd get the very painful pins and needles where I would have to stop feeding until it passed. I found it easier to lie down and feed her with my arm around her or above so her weight was not on my arms. It was the same when I nursed her but a soft pillow helps to take her weight of me. And then carrying her wasn't easier either. Its ok now she can hold onto me but I felt very weak and couldn't support her weight for more then a few minutes so with shopping etc I'd take a pram or my husband would carry her predominately.