I was induced at 37 weeks exactly after discussion with my doctors of my concerns (i had previously lost a baby at 32 weeks). I initially only inquired about the ability to be induced at the earliest "safe" date. My doctor (who is a high risk specialist) advised that from 37 weeks that would be fine. However i think it depends on the doctor, your physical health ( i had gestational diabetes) and your mental wellbeing. My mental wellbeing was not great towards the end and my doctor ended up recommending that i be induced.