A VBAC delivery is not risk-free (no birth is), and a tiny percentage of women (0.35 percent) will suffer a uterine rupture. This occurs when the uterus splits along the scar line of the previous caesarean as it contracts. Uterine rupture can also happen with women who haven’t ever had a caesarean, but they are very rare. If your scar is a classic lower horizontal scar most obstetricians and midwives should support you in trying to deliver your baby via vaginally. If your scar is vertical, there are other complications and your antenatal team may recommend an elective caesarean instead.
One increasingly apparent benefit of a VBAC delivery is that when your baby is delivered through the birth canal his skin and intestines are naturally colonized with your friendly bacteria. Babies born by caesarean section have significantly different gut flora seven years after birth. This lack of natural colonization of vitally important; lack of friendly bacteria has been implicated in the increased levels of coeliac disease and diabetes in children born by caesarean. In the future, it might be recommended that babies are artificially colonized with their mum’s vaginal flora after a caesarean delivery.