you are overdue or post-dates, meaning that your baby has not been born yet and you are at least 10-13 days past your due date. This is the most common reason for induction
your medical history suggests an earlier birth would be safer for you or your baby
there are concerns with the wellbeing of your baby, meaning that it would be safer for them to born sooner than to wait for labour to start naturally
your waters have broken and labour has not started naturally.