Deciding how to give birth after a previous caesarean section.
If you have had a caesarean section before, your midwife or Doctor will talk to you about your options for giving birth now you are pregnant again.
Let’s look at some of the research about the options on so you can make the best choice for yourself and your family.
***Key Points***
A vaginal birth is a safe choice for many birthing parents who have had a C-section previously.
Some who plan vaginal birth after caesarean section (VBAC) will birth their baby vaginally, some will end up having another C-section, some will decide the best option for them is a planned Caesarean section prior to labour.
***Key Points***
***Definitions***
VBAC – vaginal birth after caesarean. It is the term used when a woman gives birth vaginally, having had a caesarean section in a previous birth. Vaginal birth includes spontaneous vaginal delivery and a birth assisted by forceps or ventouse.
ERCS – Elective Repeat Caesarean Section. This is a choice to have a planned elective caesarean section at a planned date and time.
***Definitions***
***Benefits of a VBAC***
Benefits of planning a Vaginal birth
- You avoid the potential complications of major abdominal surgery
- You are more likely to have skin to skin contact with your baby immediately following birth
- You are less likely to have difficulties breastfeeding. With vaginal birth, levels of prolactin and oxytocin (hormones that help you make milk and bond with your baby) are higher when compared with levels after C-section.
- Your baby is less likely to be admitted to a nursery or neonatal intensive care unit (NICU) for breathing difficulties.
- You have a shorter hospital stay and a faster recovery and less pain at 2 months and 6 months after birth.
- When your baby is born vaginally, they come in contact with ‘good bacteria’. We need further research to understand the benefits of this but we know your baby is less likely to develop asthma or allergy related illnesses. It is thought this is because the good bacteria are good for the immune system of the baby.
- You are less likely to experience postnatal depression. A large in 2020 study showed lower rates of depression both short term (two weeks after birth) and long term (six months after birth) in women who had a vaginal birth compared with those who had a C-section.
- You are more likely to reflect on your birth as a positive experience.
- You are more likely to have a positive birth experience. In one large Canadian study, clients who had a VBAC rated their experiences more positively than those who had a repeat C-section. You are less likely to have postpartum depression.
***Benefits of a VBAC***
***Benefits of a ERCS***
Benefits of ERCS
- You are less likely to experience uterine rupture (see Risks section below).
- You can avoid the risk of an emergency caesarean section (see Risks section below).
- You are slightly less likely to experience urinary incontinence likely to experience pelvic organ prolapse after you have your baby. Urinary incontinence and pelvic organ prolapse are both treatable conditions.
- You have the ability to plan your Caesarean section on a known date, which may be a benefit if you have other children to consider.
***Benefits of a ERCS***
***Risks of a VBAC***
What are some risks of VBAC and C-section? Studies tell us that both VBAC and planned C-section are very safe. However, having a baby always involves some risk of complications, no matter which kind of birth you have.
Risks of VBAC
Uterine rupture
Uterine rupture occurs when the wall of the uterus tears or splits during pregnancy or labour. If this were to happen, the split would likely be along the scar tissue of the previous Caesarean section.
Uterine rupture requires emergency surgery. Uterine rupture happens in about 0.5% of all VBAC labours.
This means that one uterine rupture would be expected to occur for every 200 birthing parents who plan to have a VBAC (which means a 99.5% chance this will not happen).

The need for an emergency C-section:
Even if you plan VBAC, you may need to have a Caesarean section. If this occurs after the onset of labour this is called an emergency caesarean section.
This happens to about one in four women who plan a VBAC, approximately 25-28%
Having a Caesarean section after labour has begun is associated with more risks than a Caesarean section planned electively before labour.
***Risks of a VBAC***
***Risks of a ERCS***
RISKS of a ERCS
Risks associated with having major surgery
As with any major surgery this comes with risks. These include fever, infection, injuries to the bowel or bladder, or blood clots.
Although the risks remain low, they are higher than after a vaginal birth.
Potential issues with the placenta in future pregnancies
The scar on the uterus from a caesarean section can cause difficulties with how the placenta attaches itself to the uterus in future pregnancies.
These include conditions such as placenta previa and placenta accrete.
These conditions can cause serious bleeding and in rare occasions may result in death. The risk of placenta problems increases with each additional caesarean section
Neonatal breathing difficulties:
If your baby is born vaginally, they are squeezed as they come through the birth canal.
This has the effect of squeezing the fluid from the babies’ lungs.
When a baby is born by caesarean section this does not occur and they are more likely to have trouble breathing right after birth compared with those who are born vaginally.
Most of the time, these symptoms are mild and most babies recover quickly.
There is a higher incidence of babies with breathing problems requiring admission to a special nursery or neonatal intensive care unit (NICU) for observation or treatment.
This may mean that you are separated from your baby
Other
Having a caesarean section impacts your fertility and has the potential to make it more difficult conceiving future pregnancies.
More likely to require CS for future births
Decreased rates of breastfeeding
***Risks of a ERCS***
***VBAC is not advisable***
VBAC is normally an option for most women but it is not advisable when
- You have a pregnancy complication such as placenta praevia
- you have had three or more previous caesarean section births
- your uterus has ruptured during a previous labour
- your previous caesarean section was a ‘classical’, incision involving the upper part of the uterus
***VBAC is not advisable***
***What is the likelihood of a vaginal birth?***
What are my chances of having a VBAC?
Research tells us after one caesarean section, about three out of four women with a straightforward pregnancy who go into labour naturally will give birth vaginally.
Your chances of having a VBAC are enhanced if:
- You have had a vaginal birth in a previous pregnancy
- The reason for your last C-section does not occur again eg you baby is not breech again for this pregnancy
- Your labour starts on its own and you do not need to be induced to start labour
- Your labour progresses typically
- Continuity of care from a known midwife is shown to increase the likelihood of VBAC rates
Your chances of having a VBAC are reduced if:
- You have had more than one C-section.
- Your BMI (body mass index) is over 25.
- You are 35 years of age or older.
- You are given drugs to induce (start) or augment (strengthen or speed up) your labour.
***What is the likelihood of a vaginal birth?***
***Planning a caesarean section***
If I plan to have a ERCS – when should this be planned for?
If you decide the best decision for you and your baby is to have a planned caesarean section the best option for your baby is to book that for after 39 weeks pregnant.
This allows your baby the optimal time to mature prior to birth and reduces the likelihood your baby will require an admission to NICU.
***Planning a caesarean section***
***What are my options for pain relief***
What are my options for pain relief in labour?
It is possible to have an epidural during a VBAC labour. Discuss the risks and benefits with your midwife.
You may want to try other methods of pain relief such as massage, water immersion or nitrous oxide. These methods allow you to move and be active in labour.
There are no contraindications to water immersion for planned VBAC, using telemetry monitoring in labour.
***What are my options for pain relief***
***Induction of labour and VBAC***
Induction of labour?
If you are planning VBAC, going past your due date and being induced (having your labour started for you) are all options.
These options should be disussed with your health care provider
If you are induced, your chances of vaginal delivery are lowered and your chances of uterine rupture are increased.
An accurate due date is especially important if you are planning VBAC.
***Induction of labour and VBAC***
***What if I have more than one caesarean section?***
What if I have had more than one C-section?
It is still possible to have a VBAC after more than one C-section.
Research tells us that your chances of having a vaginal delivery are lower and your chances of uterine rupture are higher if you have had two previous C-sections.
There is very little research into VBAC after three or more C-sections.
***What if I have more than one caesarean section?***
***Deciding what is best for you and your baby***
How can I decide what’s best for me and my baby?
First discuss all the risks and benefits with your Midwife and an experienced Obstetrician. Do you have any unanswered questions, is there anything you do not understand.
Do you understand the reason for your previous caesarean section.
No think about your previous birth experience – how does it make you feel? What are your hopes for this birth?
***Deciding what is best for you and your baby***

Resources
Queensland Clinical Guidelines. Vaginal birth after caesarean (VBAC). Guideline No. MN20.12-V5-R25. Queensland Health. 2020. Available from: http://www.health.qld.gov.au/qcg
https://www.ontariomidwives.ca/sites/default/files/2021-06/Deciding-how-to-give-birth-after-caesarean-section-English.pdf
RANZCOG