Journey With Us
Twelve days late, for the third time. Same weight gain for momma; for the third time. Birth weight identical to one sibling and 2 ounces less than the other. If I was a betting woman, I would start placing bets on my pregnancies. That is if there were going to be a fourth one. I am (almost) positive this is the last baby for us. I think.
Little Miss has arrived.
www.freeimages.com/Jenny Kennedy-Olsen
You may be wondering, if I have one VBAC what happens in my next pregnancy? Am I still viewed as a VBAC?
The short answer, is yes, with a uterine scar there are risks associated with each subsequent pregnancy. The good news is these risks decrease with each additional vaginal birth after your cesarean section birth. There is not much available in updated research and literature, but there was a secondary analysis of a large study that looked at over 13,000 women attempting a VBAC in 2008.
VBAC Success
Vaginal delivery was achieved in women who had no prior VBAC 63.3% of the time, one prior VBAC 87.6% of the time, and two or more VBAC’s 90.0% of the time. There seemed to be no statistical difference once a woman had experienced two or more VBACs.
Uterine Rupture
The risk of uterine rupture decreased from 0.87% of women with no prior VBAC to 0.43-0.45% in women with a prior VBAC.
Other Risks Associated with VBAC
These risks also decreased with 1 or more VBACs
· Blood transfusion
· Blood clots
· Uterine infection
· Uterine dehiscence
· Hysterectomy*
· Poor neonatal outcomes*
· Maternal death*
* showed downward trends that were not statistically significant
So while the answer is yes, once a VBAC, always a VBAC, there is reassurance in the risks to a VBAC are decreased after one or more VBACs. And since these risks are low to begin with, perhaps the substantial rise in vaginal delivery after one successful VBAC is some of the most hopeful data gleaned from this study. When staring down your first VBAC, one of the greatest questions is, “will I deliver vaginally”? When facing your second VBAC, you can almost assuredly say, “yes I will deliver vaginally!”
April is Cesarean Awareness Month. This seems to be designated by the International Cesarean Awareness Network, but I can't really find anything about its origin.
Part of awareness is knowing your hospital's cesarean section and VBAC rates. Leap Frog Group collects information from hospitals about their first time cesarean section rate. This is under the classification of cesarean section, which is not immediately obvious that it is referring to only first time mother's whose baby is in the head down position.
Consumer Reports recently reported on the variation in hospital’s first time cesarean section rate based on the Leap Frog Group data. Neighboring hospitals may have very different cesarean section rates. While some hospitals may claim they have a higher risk population driving their cesarean section rate, this statistic is based on low risk mother's only, leaving no room for that argument.
While many larger New York City hospitals declined to submit their data to Leap Frog Group, New York State collects similar information. However, in the NYS data there does not seem to be a difference between high or low risk mothers. Additionally, primary cesarean section rate may also include mom's who had a previous vaginal delivery, but had a cesarean section in a following pregnancy. Even without the separation of low risk to high risk pregnancies, the data is somewhat telling, especially between large academic medical centers where patient population should be similar. NYS data also contains information on their VBAC rate, defined as the number of women delivering vaginally with a previous cesarean section, the denominator is all women delivering with a previous cesarean section.
Other states may have cesarean section data available. In a quick search New Jersey and Massachusetts seemed to have reports on the information, rather than an interactive website. Have information for your state? Feel free to post a link to it in the comments below.
www.freeimages.com/ Nic O' Reilly
Despite the negative effects of the ACOG practice bulletin on vaginal birth after cesarean, the document does contain many positive points that are often ignored by obstetric care providers. I encourage you to read the document if you are pursuing or deciding if you want to pursue a VBAC.
Here are a few highlights:
1. It is reasonable to attempt a trial of labor after cesarean if you have had two low transverse cesarean sections. This is also true if the woman does not know what type of scar she has.
2. While macrosomia may increase the risk of uterine rupture, this alone should not solely make the decision of repeat cesarean.
3. Going past her due date may decrease the likelihood of successful vaginal delivery, but this does not mean she should not attempt a TOLAC.
4. Twins have similar success rate of VBAC as singletons.
5. It is reasonable to induce or augment a TOLACs labor, but care should be taken in doing so.
6. External cephalic version (attempt to turn a breech baby vertex) can be considered to avoid repeat cesarean.
7. Women can chose epidural analgesia as in any labor.
If you are finding your provider is putting multiple stipulations of on your pursuit of a VBAC (delivery by due date, only if baby isn’t thought to be too large, etc) you may want to compare their care to this practice bulletin. In the end, you want a provider who believes VBAC is a good thing, rather than someone who will just “allow” it to happen under their strict criteria.
The American College of Obstetrics and Gynecology (ACOG) issued a practice bulletin in 1999 about Vaginal Birth After Cesarean. Within this practice bulletin, providers were encouraged to counsel women regarding VBAC and the likelihood of their success, but that delivery should only occur in a setting where immediate emergency care can be offered. While the first part of the recommendation is based on good scientific evidence, the second part of the recommendation is based solely on consensus and expert opinion.
In 2010 a new practice bulletin was created, and this was reaffirmed in 2015. The 2015 version starts by mentioning the large decrease in the number of women attempting a Trial of Labor after Cesarean (TOLAC). In 1996 the number of VBACs reached 28.3% (that is the percent of women delivering vaginally after a prior cesarean), and now most sources put the VBAC rate around 10% nationally.
Why the shift? The ACOG bulletin states the increasing fear of uterine rupture and liability has led to the sharp decline. However, they fail to mention their own statement about access to emergency care as part of the decline. While there was a slow decline from 1996-1999, the decline steepened after the release of the 1999 practice bulletin.
In a 2007 paper in Birth journal, researchers called over 200 hospitals in their region, and found 30% had stopped offering VBACs based on the 1999 ACOG practice bulletin. As a result access to VBAC has become far more limited in this area, and one could imagine this is also the case nationally.
This report appears to have a great deal of information about VBAC and its safety, but I admit at 300+ pages, I have only begun to skim through it. It also makes mention of this paper starting the decline of VBACs (check out the graph on page 12 of the report) in addition to the ACOG practice bulletin.
The ACOG practice bulletin has MANY good points about VBAC and how the majority of women are good candidates for a trial of labor. What is unfortunate, though, is how a single statement based on consensus and expert opinion, rather than scientific evidence, has done so much to shape access to a TOLAC.
There are a lot of mixed views on the safety of caffeine in pregnancy. This uncertainty may come from the mixed research results. Two immediate, probably uncontrollable flaws of caffeine research are, it is based on maternal recall/truthfulness and the inability to know the true caffeine levels consumed. This makes interpreting the results more difficult.
What we do know is that caffeine readily crosses the placenta, and mothers metabolize caffeine more slowly during pregnancy. Currently, ACOG recommends caffeine intake remains below 200mg a day. A brewed drip cup of coffee has about 137mg of caffeine in 8oz (though their cited source now says 95 mg) and tea is estimated to be about 48 mg. In ACOG's opinion, there does not seem to be a clear risk between moderate caffeine consumption and miscarriage, but they also don’t feel they can raise the recommendation higher at this point. ACOG also does not find a definite link between caffeine and preterm birth. More research is needed to see if there is a correlation between caffeine and intrauterine growth restriction.
I keep seeing a reference to the World Health Organization recommending less than 300mg per day, but I have yet to find this in a document. The only thing close was a WHO European document from 2001, recommending intake be no more than 3-4 cups of coffee a day. (If anyone finds a proper source, please let me know!)
While ACOG looked at two large studies in regards to caffeine and miscarriage, a recent meta-analysis included 14 studies. The authors' conclusion was high levels of caffeine consumption (>350mg per day) was related to increased miscarriage risk.
In looking at low birth weight, another meta-analysis found that high levels of caffeine were associated with lower birth weight. High level was not defined. 13 studies were included.
This was the only study I could find related to a possible increase risk of preterm birth. It seems there might be an association between preterm birth and Japanese and Chinese Tea; soft drinks and coffee did not have the same effect.
It appears that 200-300mg of caffeine a day is safe during pregnancy. Knowing this, it is a good idea to consider all sources, and know the amount you consume.
For someone who personally loves coffee, limiting my consumption during pregnancy is tough, especially once the nausea subsides. Part of the love is related to the feeling of a warm mug in hand, so I try to find some substitutes. I will make my coffee half decaf. And while drinking a cup of total decaf coffee is often not palatable, I do like decaf black tea. This year I have tried hot water with lemon and honey. Though not my loved cup of coffee, overall it hits the warm mug in hand spot.
Thoughts of caffeine? Any good substitutes you have found?
I hope that you have heard of Ina May Gaskin. She is an amazing woman who became a midwife on a commune in Tennessee. This TEDx talk just scratches the surface of her passion and work. I encourage you to check out anything she has written or videos about her work and life.
On her website can you more information about the books she has written. inamay.com
Enjoy and let me know what you think about Ms. Gaskin!
During pregnancy you may be tested to see if you are anemic. The blood count level your provider is most often looking at is your hematocrit/hemoglobin levels. The criteria for anemia changes during pregnancy, as your blood volume changes.
The American College of Obstetrics and Gynecology recommends that women who are anemic during pregnancy have further work-up to determine the source. If you are borderline anemic or have struggled with anemia in the past, you may want to attempt to increase your iron stores if a work-up isn’t indicated.
When looking up ways to increase your iron intake, you may have heard that calcium interferes with the absorption of iron. However, it actually seems like the evidence is unclear. In the immediate sense, calcium does block the absorption of iron, but the long-term effect does not seem to have a strong negative impact. On the flip side, Vitamin C (ascorbic acid) has been shown to increase the iron absorption. It is easy enough to find a list of high iron foods, but where do you go from there.
Because the evidence is unclear, moving from information to intake can be a little perplexing. Adding extra iron to your diet might be enough without changing your calcium/Vitamin C intake if you are looking to make a slight bump in your numbers. But what if you want to go a step further? It would seem reasonable to consider adding in one or two high meals or snacks that maximize the absorption. Here are a few suggestions to potentially increase the amount of absorption:
Leafy green salad: Skip the cheese and dress with lemon juice and oil. Top with chickpeas, pumpkin seeds, and broccoli, perhaps raisins for a touch of sweetness. Making this for dinner, and top with steak.
Chili: Find a ground beef recipe that is heavy on the beans. Again skip the cheese and consider avocado as a topping. If you can’t live without the creaminess, use sour cream instead of cheese. If you stick with the two tablespoon serving suggestion, the amount shouldn’t change the iron absorption.
Hummus: Made from chickpeas, hummus is rich in iron. Squeeze a little extra lemon juice on your serving. Not feeling the hummus, try eating the beans whole as a snack.
Simple switches:
Soup for lunch? Consider lentil, black bean, or a broth based one that includes beans.
Cereal for breakfast? Check out the labels on your favorites. Go for the one that has the highest iron content.
Craving a little sweet? While I wouldn’t use the iron content as an excuse to indulge, if you are going there anyway consider dark chocolate. Real black licorice candy also contain a small amount of iron.
Apparently spices such as thyme, parsley, and cumin can also add to your iron intake.
In general, babies take what they need from mom, so unless she is severely anemic the baby will still be able to build enough iron stores for after delivery. However, if mom’s levels are already low, it could mean that mom is the one left in need. Making small diet changes can help increase mom’s iron stores, letting her feel less depleted.
Have you heard about the Listening to Mother's surveys? In 2013 the third report was published, where over 1000 women in the United States were interviewed about their childbirth experience. This report gives a snapshot of the state of maternity care in the United States.
Some of the results are mind blowing! One of the most startling results was about women being told their baby would be "big" at the end of their pregnancy. In the shared decision making section, 32% of women reported they were told their baby may be big. The majority of these mother's said their practitioner brought up an induction (62%) and 44% reported a discussion about cesarean. In the end, the average size of the baby's actual birth weight was 7lbs 13oz.
Another startling response was that 47% of first time moms reported being induced. Almost half!
In teaching childbirth classes, there is often this disconnect where you sometimes feel like you are teaching women to fight for their rights. Many elements in this report underscore the importance of women learning to be advocates for their care. But is that fair? Should a woman in labor or at the end of her pregnancy be expected to stand her ground when it comes to unnecessary interventions, or rather should it be expected that she will be offered good quality care based on evidence and putting her first?
I encourage you to check out the results and consider the state of maternity care in the US.
With each of my pregnancies I have gained the majority of my weight in the second trimester. As many women gain their highest amount in the third trimester or at least maintain a steady weight gain, this had myself and my providers nervous in the past.
The first time around, I was the nervous one. However, if memory serves me correctly, I didn’t gain any weight after 32 weeks and found myself delivering at the low end of my pre-pregnancy weight gain recommendation*. The second time around, it was my providers who were a little nervous. At 26 weeks I had gained 19 lbs, and was on track to gain about 35 lbs if the momentum stayed the same throughout my pregnancy. Somehow I found myself at the exact same weight gain as my first when delivering my second.
This time around I am on a similar weight gain pattern, and if history serves me well, the weight gain should start to slow down soon. But with my first VBAC pregnancy, I had to ask myself, why does my provider care so much if I gain 35 lbs? At the time I did a literature search and found gaining weight above the Institute of Medicine’s recommendation was negatively associated with successful VBAC. I was curious to see if any new literature had surfaced since that time. Here is what I found.
This article studied women considered high-risk during pregnancy, classified by hypertension, diabetes, and/or obesity. The researchers found women who gained more than the weight gain recommendations were less likely to have a VBAC. The abstract states the weight of 30lbs, but I did not find this specification in the article, just the description of exceeding recommended weight gain based on pre-pregnancy BMI. The study did not seem to consider pre-pregnancy BMI and weight gain separate from the other high-risk factors, though the majority (63%) in the study were obese. What I mean by this is, was the weight gain more impactful if the woman was already obese?
This article looked at pre-pregnancy BMI and weight gain. Both obesity and excessive weight gain, 40lbs in this article, were negatively associated with VBAC. The abstract spells out the different rates.
I found this article a little bit difficult to follow. In the abstract the authors state a BMI >25 is significantly associated with a decreased success rate. While, it never states when the BMI was measured, I can only assume that it is the labor admission BMI, as all of the other variables measured were upon labor admission (gestational age, cervical dilation, etc.). Essentially, only 20% of those in the successful VBAC group had a BMI >25, while 58% of those in the failed VBAC group had a BMI >25. The amount of weight gain that this would relate to varies, depending on a woman’s starting BMI.
Lastly, this article discussed weight gain between the first and second pregnancy. An increasing BMI between pregnancies was associated with a decreased success rate, and a decreasing BMI in women who were overweight or obese before their first pregnancy was associated with a higher success rate. If you aren’t already pregnant, and are planning a VBAC with your next pregnancy, you may want to pay attention to your inter-pregnancy weight.
To be clear, none of the authors stated that a high weight gain or BMI at the time of delivery was an indication to have a planned repeat cesarean. They were only exploring factors associated with a successful VBAC. That said, it may be prudent to only gain within the IOM’s recommendations for pregnancy weight gain while planning a VBAC.
*every woman's weight gain pattern varies during pregnancy. My own story is not an example of how it should/should not be done.