Are there any situations where the risk of the scar rupturing is lower than average?

If you have ever given birth vaginally or had a VBAC, your chance of having scar problems with a VBAC labor are reduced.Guise, J.M., Eden, K., Emeis, C., . . . McDonagh, M. (2010). Vaginal birth after cesarean: New insights. Evidence Report/Technology Assessment No.191. (Prepared by the Oregon Health & Science University Evidence-based Practice Center under Contract No. 290-2007-10057-I). AHRQ Publication No. 10-E003. Rockville, MD: Agency for Healthcare Research and Quality.