Its our family, I just read this section in the VBAC Companion by Diana Korte (1997) that seems to answer your question perfectly:
'However, according to the Cochrane Database of Systemic Reviews, the largest and most reliable pregnancy and childbirth resource, a history of a cesarean is a factor in less than half of reported cases of uterine rupture. Rupture can occur in any trimester, or in a woman who has not had a cesarean, or even in a woman who is not pregnant.'
It goes on to talk about other risk factors for ruptures, like a history of D&Cs. But hey, as c/b women, we get the bad rap.
'However, according to the Cochrane Database of Systemic Reviews, the largest and most reliable pregnancy and childbirth resource, a history of a cesarean is a factor in less than half of reported cases of uterine rupture. Rupture can occur in any trimester, or in a woman who has not had a cesarean, or even in a woman who is not pregnant.'
It goes on to talk about other risk factors for ruptures, like a history of D&Cs. But hey, as c/b women, we get the bad rap.