I saw that article too and the 40% figure shocked me.
I was fine after my first birth, but the second one (v. fast labour, 8lb 14oz baby, midwives telling me 'Push!', because he was in distress), left me with three different prolapses. The rectocele is the worst. I did my pelvic floor exercises religiously for months afterwards, but I knew something was wrong, because I'd felt a popping sensation when DS2 was being born.
Anyway, I didn't see much improvement and finally went to see my GP after about 3 years. He was great - immediately referred me to a consultant gynaecologist for examination. The guy was really rough when he did my exam and said 'At least you're nice and slim so I can feel what's going on', which didn't exactly make me feel great (what if I hadn't been?), and he confirmed uterine prolapse, rear vaginal wall and I don't even know what the other one is. Anyway, he said I'd need a hysterectomy to correct the uterine prolapse, but 'It's not serious enough yet, so you'll have to wait', and said I couldn't have vaginal repair for the rectocele until after the hysterectomy. I suffer from constipation all the time (not helped by IBS), and he breezily said 'Well you have to put your thumb into your vagina and push backwards to help evacuation. Jesus wept! And this is normal and acceptable and it's not 'bad enough' to warrant surgery???? The only comfort is that at least I've been spared vaginal mesh which, thank god, finally looks like it will be banned.
You're damn right this is a feminist issue.