Hey Pink,
apparently most people find it goes really quickly. They usually say there's an immediate improvement after the birth (unless you allow forceps like me, idiot, forceps and SPD do NOT mix) then it's about 5 months till it's completely gone.
Yes, some people it never quite goes, but I think that's more with DSP sufferers, and probably underlying mis-alignment too from what I've read/heard.
Don't worry too much about thinking your exp will be like mine as I had an unfortunate set of things going on. I had a twisted sacrum that went unnoticed from the birth too remember, and I also have some osteoarthritis in my lower spine that got picked up too in the investigations...
So you may find you get instant relief when baby is born, unlike me. The weight that was in your tum isn't all baby, so caring for him/her after will be a lighter load anyway.
Because of all the stuff going on with my back and pelvis my GP, the physio, and the osteopath all said I should have an easier time if I waited until my son was three to have another, but probably because firstly it took so long for the back stuff to be picked up, and secondly I also had to have birth trauma repair surgery twice, and each recovery period (with no lifting for six weeks) set me back. So when I did get back to caring for and lifting my son who was quite chunky, it
was a shock to the system again.
I didn't plan this pregnancy but we're in agreement it all happened for the best because it turns out I've been much better this time, and I'm really confident about getting my fitness back afterwards. Lots of walking and sit ups/core strength excercises will get me there. And did I mention my osteopath is a life-saver??
I read some interesting research from Norway (or sweden, can't remember!) that said it takes 6 years from the birth to completely recover for some. When I read that it didn't seem worth waiting three years only to start the six year wait again IYSWIM.
The only thing that still confuses me is how people like the Pelvic Partnership, the physio's and the Osteopath, all of whom I respect, can disagree so much on the cause of SPD. i.e. whether it's alignment or hormones.
Those who think it's hormonal would say that as long as you are breastfeeding it can affect recovery, (which others won't accept because of the B/F implications obviously) - but the day I absolutely knew I was (unexpectedly) pregnant, I had all my SPD symptoms, sciatica, pelvic pain, sacro-illiac pain, I just knew... At that time it was so early and obviously no weight gain so it had to be the rush of hormones.
But also I'm not suffering so badly this time, and that has to be from the constant re-aligment from the osteo, so I really think both factors can be to blame.
Anyway, I'm really waffling now but having had this crap blight my life for so long I am just amazed to be 8 months gone and walking unaided and not suffering like before. Did I mention you should try osteopathy??