I have a bad back and with number two my back was UNBEARABLE by 12 weeks. I started seeing my chiro 3 times a week and by about 20 weeks my back was painfree (eventually got down to monthly visits). I absolutely swear that seeing my chiro helped me have an hour 54 labour. I believe I was in such good shape from my adjustments that coco slid out!! (still damn painful...). My chiro uses a gun type thing, no cracking or anything like that, very gentle. Good luck xo