Published on June 25, 2020

Cesarean sections are at an all-time high in the United States, making up for close to 32% of deliveries. Unfortunately, primary cesarean and repeat cesarean sections are also related to the highest rates of maternal morbidity. While cesarean sections can be life-saving for both the mother and child, if vitamin D can reduce the risk of needing a cesarean section, it may in turn also help reduce the risk of maternal mortality rates.

Is vitamin D related to the birthing process?

When vitamin D deficiency was common in the industrialized cities at the turn of the 20th century, rickets ran rampant, and rachitic pelvis (generally, a flattened or deformed pelvis) was a common cause of death in childbirth. This condition was one of the reasons that cesarean sections became an established medical intervention in childbirth. With the discovery of vitamin D, rachitic pelvis has been nearly eradicated, however, causes such as poor muscular performance and narrow pelvis, leading to difficulties during birth and a failure to progress, have become common causes for cesarean section deliveries. Vitamin D is known to play a role in skeletal and smooth muscle strength, and has also been associated with conditions such as preeclampsia, preterm birth, and maternal infection.

Could vitamin D levels be related to cesarean section risk?

In a study by Merewood et al. the association between vitamin D levels and primary cesarean section was evaluated in a group of 253 women who gave birth at a hospital in Boston. Of those women, 17% had a primary cesarean section (first-time cesarean section), with reasons including failure to progress (17 of 43), non-reassuring fetal tracing (11 of 43), malpresentation or breech (6 of 43), and cephalopelvic disproportion, variable fetal heart rate, and other (each 3 of 43). When comparing rates of cesarean section to vitamin D levels, it was found that 28% of the women whose vitamin D level was below 15 ng/ml (37.5 nmol/L) had a primary cesarean, compared to only 14% of women with a vitamin D level of 15 ng/ml or greater (P=0.012). It was also observed that those women who had a cesarean section had an average vitamin D level of 18 ng/ml (45 nmol/L), versus an average level of 25 ng/ml (62.5 nmol/L) for women who gave birth vaginally (P=0.007). Overall, women who had a vitamin D level below 15 ng/ml were almost 4 times more likely to have a primary cesarean section compared to women with higher levels of vitamin D.

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The graph above shows the relationship between the mother’s vitamin D level and the probability of having a cesarean section, based on the data from this study. It shows a marked decrease in the chances of having a cesarean section as vitamin D levels increase.

Vitamin D is Important for Pregnancy and the Baby

For several years, GrassrootsHealth has emphasized the importance of vitamin D for pregnancy and the newborn, especially with the Protect Our Children NOW! project and its implementation at the Medical University of South Carolina. This project confirmed previous research findings that pregnant women with serum vitamin D levels of at least 40 ng/ml (100 nmol/L) had a 60% lower risk of preterm birth.

The benefits of vitamin D go well beyond pregnancy and birth, however. Vitamin D deficiency in newborns presents an increased risk for impairment in immune function, brain development, and skeletal development, among other things. Health conditions that have been associated with prenatal vitamin D deficiency include asthma, ear and lung infections, autism, type 1 diabetes and other autoimmune conditions, and an increased risk for certain cancers and cardiovascular disease later in life. See our Disease Incidence Prevention Chart for Pregnancy and Children for more details and resources.

Ensure a healthy vitamin D level for pregnancy and baby!

Testing your vitamin D level regularly and taking steps to keep it at a target level of 40-60 ng/ml (100-150 nmol/L) is important for all stages of health, especially during pregnancy. To know if you are getting enough, make sure you test today!

Are You Getting Enough Vitamin D to Help Yourself?

We’re in a time of great crisis that could be greatly affected by making sure you and everyone you know has a serum level of at least 40 ng/ml. Help us help you.

Do you know what your vitamin D level is? Be sure to test today to find out, and take steps to keep it within a target of 40-60 ng/ml or 100-150 nmol/L! Give your immune system the nutrients it needs to support a healthy you and protect yourself from unnecessary diseases.

GrassrootsHealth Nutrient Research Institute is preparing to do a Community RCT with the use of our myData-myAnswers nutrient health system that over 15,000 people are already using for their health. We will demonstrate how one can use the Nutrient Research Model established by Dr. Robert Heaney to establish the effect of vitamin D serum levels of at least 40 ng/ml (100 nmol/L) on risk reduction with different ethnicities in the population. Please let us know if you’re interested in helping sponsor this project.

CLICK HERE for updates and new information about the project.

Through GrassrootsHealth Nutrient Research Institute, you can also test your essential elements magnesium, copper, zinc and selenium, toxins such as lead, mercury and cadmium, as well as your omega-3 levels, inflammation levels and thyroid stimulating hormone (TSH) level. Find out your levels today! Log on to the test selection page (click the link below) to get your tests and see for yourself if your levels can be improved.

Make sure you track your results before and after, about every 6 months!

Click Here to Access the Test Page

How can I track my nutrient intake and levels over time?

To help you track your supplement use and nutrient levels, GrassrootsHealth has created the Personal Health Nutrient Decision System called

For each specific supplement, you can track what days you take it, how much, and many other details.  This will help you know your true supplemental intake and what patterns of use work for you to reach and maintain optimum nutrient levels.  Check it out today!

How Can You Use this Information for YOUR Health?

Having and maintaining healthy vitamin D and other nutrient levels can help improve your health now and for your future. Measuring is the only way to make sure you are getting enough!

STEP 1 Order your at-home blood spot test kit to measure vitamin D and other nutrients of concern to you, such as omega-3s, magnesium, essential and toxic elements (zinc, copper, selenium, lead, cadmium, mercury); include hsCRP as a marker of inflammation or HbA1c for blood sugar health

STEP 2 Answer the online questionnaire as part of the GrassrootsHealth study

STEP 3 Using our educational materials and tools (such as our dose calculators), assess your results to determine if you are in your desired target range or if actions should be taken to get there

STEP 4 After 3-6 months of implementing your changes, re-test to see if you have achieved your target level(s)

Enroll in D*action and Build Your Custom Test Kit!

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