OBGYN, Pregnancy and Childbirth Care
Vaginal Birth After Cesarean (VBAC)
Vaginal birth after cesarean (VBAC) refers to the practice in which a baby is delivered vaginally (naturally) after a previous child had been birthed via a cesarean section (C-section). Women who attempt VBAC experience what is called a "trial of labor," in which the goal is to have a vaginal birth, with the chance of an emergency C-section taking place should complications arise mid-procedure. These complications may include infection, difficult labor, breech presentation or concerns about the baby's size or heart rate.
Who can attempt a VBAC?
In order for doctors to consider VBAC as a viable delivery option, both the expectant mother and the hospital where she plans to deliver must meet certain requirements, including:
- No medical indication for a C-section in this pregnancy
- No more than two low, side-to-side uterine scars from previous C-sections (if you do have more than one scar, you must have delivered vaginally at least once)
- No scarring on the lower, thinner part of the mother's uterus
- The hospital where the mother plans on delivering must have the staff, tools and an operating room ready to perform an emergency C-section at a moment's notice
VBAC is still considered to be safe if the mother is over 35 years old, has a large fetus or is pregnant for more than 40 weeks, but these three factors do lower the chance of being able to deliver vaginally.
Benefits and risks of a VBAC.
There are multiple benefits to having a VBAC instead of a C-section. Not only is the procedure less painful and faster to recover from, but it also offers a lower risk of infection compared to a C-section. Having a vaginal delivery also avoids the creation of multiple scars on the woman's uterus. This is important if the mother plans on having another child later on, as excess uterine scarring can increase the chance of problems with a future pregnancy.
Two primary risks are associated with attempting a VBAC. First is the chance of infection, which increases should an emergency C-section take place. The second and more serious risk posed by a trial of labor is that of symptomatic uterine rupture, in which one of the mother's pre-existing C-section scars burst open during labor. While not always fatal, this can pose serious risks for both the mother and child.
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