Is It Safer to Have Another Cesarean or Attempt a Vaginal Birth (VBAC)?

And the evidence in favor of vaginal birth over repeated cesareans just keeps piling up!
Check out this most recent study, just published in the journal of
Obstetrics & Gynecology
(2008;111:285- 291).

The study's OBJECTIVE:
To estimate the success rates and risks of anattempted vaginal birth after cesarean delivery (VBAC) according to the number of prior successful VBACs.

METHODS:

From a prospective multicenter registry collected at 19 clinical
centers from 1999 to 2002, we selected women with one or more prior low
transverse cesarean deliveries who attempted a VBAC in the current
pregnancy. Outcomes were compared according to the number of prior VBAC
attempts subsequent to the last cesarean delivery.

RESULTS:

Among 13,532 women meeting eligibility criteria, VBAC success
increased with increasing number of prior VBACs: 63.3%, 87.6%, 90.9%, 90.6%,
and 91.6% for those with 0, 1, 2, 3, and 4 or more prior VBACs, respectively
(P<.001).

The rate of uterine rupture decreased after the first successful VBAC and did not increase thereafter: 0.87%, 0.45%, 0.38%, 0.54%, 0.52%(P=.03) .

The risk of uterine dehiscence and other peripartum complications also declined statistically after the first successful VBAC. No increase in neonatal morbidities was seen with increasing VBAC number thereafter.

CONCLUSION:

Women with prior successful VBAC attempts are at low risk for maternal and neonatal complications during subsequent VBAC attempts. An increasing number of prior VBACs is associated with a greater probability of VBAC success, as well as a lower risk of uterine rupture and perinatal complications in the current pregnancy. Contrast that study with another from Obstetrics & Gynecology (2006;107:1226- 1232) which found that there is maternal morbidity associated with multiple repeat cesareans.

OBJECTIVE:

To estimate the magnitude of increased maternal morbidity associated with increasing number of cesarean deliveries.

METHODS:

Prospective observational cohort of 30,132 women who had cesarean delivery without labor in 19 academic centers over 4 years (1999-2002). RESULTS: There were 6,201 first (primary), 15,808 second, 6,324 third, 1,452 fourth, 258 fifth, and 89 sixth or more cesarean deliveries. The risks of placenta accreta, cystotomy, bowel injury, ureteral injury, and ileus, the need for postoperative ventilation, intensive care unit admission, hysterectomy, and blood transfusion requiring 4 or more units, and the duration of operative time and hospital stay *significantly increased *with increasing number of cesarean deliveries. Placenta accreta was present in 15 (0.24%), 49 (0.31%), 36 (0.57%), 31 (2.13%), 6 (2.33%), and 6 (6.74%) women undergoing their first, second, third, fourth, fifth, and sixth or more cesarean deliveries, respectively. Hysterectomy was required in 40 (0.65%) first, 67 (0.42%) second, 57 (0.90%) third, 35 (2.41%) fourth, 9 (3.49%) fifth, and 8 (8.99%) sixth or more cesarean deliveries. In the 723 women with previa, the risk for placenta accreta was 3%, 11%, 40%, 61%, and 67% for first, second, third, fourth, and fifth or more repeat cesarean deliveries, respectively.

CONCLUSION:

Because serious maternal morbidity increases progressively with increasing number of cesarean deliveries, the number of intended pregnancies should be considered during counseling regarding elective repeat cesarean operation versus a trial of labor and when debating the merits of elective primary cesarean delivery.

Frank Conversations on Cesareans

Most of the “risk” that we hear discussed for Cesarean section includes the possibility of

~post-operative infection,

~blood clots,

~anesthesia complications,

~damage to the bladder and bowels,

~potential problems with future pregnancies like infertility, miscarriage, placenta accreta

and placenta praevia

~and in some rare cases, even death.

Yet, few obstetricians really cover these potential complications in a way that will give a birthing mother a realistic view of what all her C-section could entail – a whole lot more than her idea of “I’ll be kind of sore for a few days or weeks.”

A friend of mine who recently had an elective cesarean developed blood clots afterwards and was shocked to hear that they could have been a result of how she chose to have her baby. Of course, she could have read up on the potential complications and figured that out herself ahead of time, but really, physicians should either thoroughly inform their patients themselves or see to it that they are reading books and doing research and getting informed during their pregnancies. And more than just reading, “What To Expect When You’re Expecting” or watching birth stories on TV.

Sure, of course, the anesthesiologist comes in and rattles off the usual, “you could die, be permanently paralyzed, etc.” stuff as the laboring mother is doing her best to hold herself together and prepare for the long ride down the hall to the OR, wondering if her baby will be okay. Of course, she nods and says she understands and scribbles her name on the paper in between contractions. But does she really understand what she’s signing up for?

That’s what I wonder. What kind of conversations do doctors have with their pregnant patients about the possibilities of a cesarean? …Not only that it could happen to them for various reasons (some good and some not so good), but that by simply having a cesarean, they are increasing their risk for many more complications.

Do they have frank conversations with their patients about weighing risks and benefits of a cesarean for a non-life threatening issue that comes up in labor (i.e. labor isn’t happening as fast as usual) if they are planning to have more children in the future? Or do they just imply that, “If you end up with a cesarean, trust me, it will be for a good reason to make sure you have a live, healthy baby. Vaginal births are great, but don’t get your hopes too high. You don’t want to be disappointed if it doesn’t work, because, really, your goal is a healthy baby, not how you have your baby.”

What Are the Risks of Cesarean Section?

What are the risks of having a Cesarean section? …The risk of having two, even three C-sections? …For the mother, for the baby?

What are the risks of vaginal birth? …For the mother, for the baby?

If you are the typical American woman wondering about these questions, you’ll probably ask your doctor, perhaps check out a few resources online and see what the most popular pregnancy guide book, What to Expect When You’re Expecting has to say. You might even ask your childbirth educator about c-sections, and she would probably help you feel more prepared for it, by explaining when it is likely to happen and how you may feel about it if/when it happens to you.

Hearing women talk about cesareans has often made me wonder exactly what the average pregnant woman does and doesn’t know about having a c-section when she walks into the hospital to give birth. I’m on a mission to find out…

Is she adequately informed of the risks? Does she have a clear idea of the risks and benefits? Does she know as much about this procedure on her and her baby’s body as she does about purchasing her new car and comparing models?

I checked out What to Expect When You’re Expecting, and no where in its 437 pages could I find even one paragraph informing mothers of the potential risks for themselves when undergoing Cesarean delivery. The most I found for mothers was information on what a C-section would be like and how to be calm as you were wheeled back to the operating room for an emergency c-section, and then what recovery would entail – pain around the incision, possibly nausea and vomiting, possibly referred shoulder pain for a few hours and possible constipation, then it should be 4-6 weeks before you feel completely back to normal.

And this quote to put everyone’s fears to rest –

Question: “My doctor told me I will have to have a cesarean. But I’m afraid the surgery will be dangerous.”

Answer: “Today…cesareans are nearly as safe as vaginal deliveries for the mother, and in difficult deliveries or when there’s fetal distress, they are often the safest mode of delivery for the baby. Even though its technically called major surgery, a cesarean carries relatively minor risks – much closer to those of a tonsillectomy than of a gall bladder operation, for instance.”

Hmmmm…I’ve heard a few other things about cesareans recently. I’ll post them here as I get a chance…