You and your doctor have decided to attempt delivery by vaginal delivery even though you have had a cesarean section previously.  If you attempt vaginal delivery it still might become necessary to deliver your child by cesarean section even after labor has commenced.  There are some complications from vaginal deliveries even though they are quite uncommon.  The risks of complications of a cesarean section may be slightly higher following attempted vaginal delivery.  In addition, there are some risks of vaginal deliveries after previous cesarean sections which seem to be higher than a vaginal delivery when there was no prior cesarean section.  Due to these facts, your physician can make no guarantee as the result of either type of delivery. 

Bleeding and infection are possible complications of any childbirth.  These could result in prolonged illness, permanent types of deformity, poor healing wounds, blood transfusions and a possible need for major additional surgery.  On rare occasions it would be necessary for the doctor to remove the uterus (womb) just to stop life threatening bleeding.  Because of the scar on the uterus (womb) from the previous cesarean section, there is a possibility that you can rupture the uterus.  The risk of rupturing the uterus is higher for the patient than a woman who has had no uterine surgery.  This could lead to severe and permanent complications for the fetus.  This may also lead to damage to the urinary tract and the intestines.  This type of damage can result in connections of the intestines and urinary tract as well as improper functioning.  In addition, there could be nerve damage, blood clots in the lungs and legs and pneumonia which can also be caused by either vaginal childbirth or cesarean section.