Creating life demands significant time and energy. Naturally, this process requires increased nutrients to support proper fetal growth and development. While a healthy lifestyle is always encouraged, consuming enough nutrient-rich foods to meet a growing baby’s needs isn’t always feasible. Enter prenatal vitamins.
Prenatal supplements have helped women bridge nutritional gaps during pregnancy for decades. Most doctors recommend prenatal vitamins for women who are pregnant, planning pregnancy, or lactating—but what do we really know about them? And how many women actually take them?
Prenatal vitamins come in various forms depending on the brand. While many nutrients increase during pregnancy, no current guidelines govern what supplement companies must include in their products. The most crucial nutrients in prenatal vitamins include folic acid, iron, calcium, vitamin D, and iodine.
Like most supplements, some prenatal formulas are superior to others. You can choose options that emphasize specific nutrients of concern, such as iron or vitamin B12. Despite the massive prenatal supplement market, many women still don’t utilize these supplements—even with ongoing research proving the importance of certain nutrients for healthy fetal development.
Below are key statistics on prenatal vitamins.
- The global prenatal vitamin supplement market size was estimated to be 409.8 million in 2019.
- Prenatal iron deficiency affects 19.2% of women.
- Vitamin A deficiency affects an estimated 15% of pregnant women in low-income countries.
- In developing countries, only 4% of women in their first trimester did not have any nutrient deficiencies.
- 98% of women took at least one supplement during pregnancy.
1. Fewer than half of U.S women reported taking prenatal vitamins before pregnancy
(Prenatal Health and Nutrition Survey, 2017)
According to the 2017 Prenatal Health and Nutrition Survey by the March of Dimes, 97% of women aged 18-45 from a sample of over 1,000 reported taking prenatal vitamins during pregnancy. However, only 34% took them before knowing they were pregnant. This percentage drops further among Hispanic women (27%) and African American women (10%).
2. A study on urban women showed fewer than 5% supplemented with folic acid before pregnancy
(American Journal of Public Health, 2018)
A study by John’s Hopkins Children’s Center of over 7,000 low-income urban mothers revealed an alarmingly low percentage (5%) consistently supplemented with folic acid before pregnancy. Pre-pregnancy and prenatal folic acid supplementation is a widely recommended public health measure to reduce birth defects in children, including neural tube defects and anencephaly.
3. Study suggests that 95% of pregnant women are not meeting recommendations for vitamins D, C, A, B6, K, and E, as well as folate, choline, iron, calcium, potassium, magnesium, and zinc even with the use of dietary supplements.
Among the 1,003 pregnant women studied (ages 20-40), approximately one-third overconsumed nutrients such as sodium and folic acid. While supplements helped reduce deficiency risks, they also led to excessive intake of certain nutrients that aren’t recommended for optimal fetal development.
4. One study indicates that continuing to take a pre or postnatal vitamin with folate, DHA, vitamin D, and iodine can help a baby’s brain development, processing skills, and visual acuity.
Beyond prenatal supplementation during pregnancy, continued supplementation remains crucial for breastfeeding mothers. Many nutrient needs stay elevated during this period to ensure adequate nutrition for the baby, which is why doctors recommend continuing prenatal supplements throughout breastfeeding.
5. Approximately 55–60% of women in their first trimester reported taking folic acid- or iron-containing supplements compared with 76–78% in their second trimester and 89% in their third trimester.
Prenatal supplements are strongly encouraged before and during pregnancy, as well as during breastfeeding. Unfortunately, numerous studies show that many women don’t begin consistent prenatal vitamin use until well into their pregnancy.
6. A daily intake of 400mcg of folic acid can prevent severe congenital defects of the brain and spine.
(CDC)
Folic acid represents a critical nutrient in prenatal care, making it heavily emphasized in prenatal vitamin supplementation to prevent congenital defects like neural tube defects. A daily intake of just 400mcg of folic acid can prevent this condition during gestation.
7. 7 out of 10 neural tube defects can be prevented by using supplements with folic acid.
Folic acid occurs naturally in many foods including leafy greens, beans, certain nuts and seeds, fresh fruit, whole grains, liver, and seafood. For those in urban areas where these foods may be less accessible, supplementation becomes more essential.
8. Prenatal supplements can help manage postpartum blues.
(CDC)
Prenatal depression can worsen when specific vitamin and mineral deficiencies are present. By maintaining consistent prenatal supplementation during pregnancy and immediately after birth, postpartum blues may become more manageable for some women.
9. 63% of pregnant women recognize folic acid as a vital nutrient during pregnancy.
Despite strong encouragement from the health community, only slightly more than half of pregnant women recognize folic acid as an important nutrient during pregnancy.
10. Studies on the use of probiotics during pregnancy are ongoing and inconclusive, but some benefits have been shown
Although not standard in most prenatal supplements, probiotics and prebiotics have begun appearing in prenatal care products. While research has identified many positive effects from probiotic supplementation, extensive research remains needed, particularly for pregnant individuals with compromised immune systems.
