There are many factors that you and your doctor should discuss, such as if you’ve ever had a vaginal delivery before and the reason for your previous c-section. If you've had a prior vaginal delivery, that makes you the most optimal candidate out there. Your body knows what to do, putting you at the safest end of the spectrum.
You'll also want to discuss the reason for your earlier c-section. If it was due to a situation that isn't likely to happen again, such as having a breech baby, that's the next best predictor of success, says Dr. Gregory. On the other hand "reoccurring reasons," such as not dilating or a failure for the baby to descend into the birth canal, could happen in your next delivery attempt, making VBAC more difficult. These factors, however, do not necessarily rule out a VBAC attempt, says Dr. Ecker.