I tried EPO, RLT, acupuncture, curries, pineapple, walking, DTD...all from at leaast 38 weeks, some of them earlier, and I went 10 days over.
I wouldn't say they don't work, but certainly some babies will just come when they are ready
I would check with your doctor before trying any of them JIC - I don't know what your medical condition is but it might affect what you can try.
Good luck