it's not always the case - especially if you're not insulin-dependent. as far as i know, it's mostly the insulin that gives them cause for concern. they do tend to talk about induction at 40 weeks (some even before). i held off till 40 weeks last time to give myself a fighting chance but i didn't beat it. because i laboured okay last time, they're happy to let me go to the 40 weeks again. but i'll be doing everything i can to try & get there first i think seeing it's your 3rd & things have gone well previously, they may be more inclined to let you wait. they may just ask you to have some extra monitoring towards the end.