That really is one to talk to your consultant (obs) about...as I think different hospitals have different policies. 2 years ago, I would have been induced at 38 weeks...but was instead booked in for a c section. I got to 36 weeks before they actually committed to anything then...being told, just see how it goes...ver annoying, I wanted to know!
I think, in general, if all is looking good, then they will probably induce you at 38 weeks, but it will depend what teh scans say, and your control, bp are like etc. I was told early on teh 38 weeks was teh longest they would let me go...but my 1st baby was born at 35 + 6...after an emergency c section, so I was never going to be typical!