Hi,
I've been induced twice now. Basically, they use a pessary and put it up you (sorry for the wording) and wait about six hours to see if anything happens. If yes, great, if not, they will repeat it, up to 3, but occasionally four times. If it doesn;t send you into labour (it never put me in labour) they just want it to open your cervix and bring it low enough to break your waters. If breaking your waters still doesn't work, they connect you to a drip to make the contractions happen. From what I understand, it's the drip that increases the risk of c-section, as the contractions are forced, they come on a lot faster and more sudden and more painful than a normal labour, so your baby can get distressed as they are not eased into whats happening. I will, however, say I have heard this is quite rare, and could happen in a normal labour anyway!
xx