Among women planning to conceive after a pregnancy loss, sufficient preconception levels of vitamin D was associated with increased likelihood of pregnancy and live birth, compared to women with insufficient levels of the vitamin. Researchers performed a secondary analysis of the Effects of Aspirin in Gestation and Reproduction (EAGeR) trial, which sought to determine if daily low-dose aspirin (81 mg) could prevent miscarriage in women with a history of pregnancy loss. Blood levels of vitamin D were tested for ~1,200 women aged 18 to 40 years before pregnancy and again at the eighth week of pregnancy.
- Women who had sufficient preconception vitamin D concentrations were 10% more likely to become pregnancy and 15% more likely to have a live birth.
- Among women who became pregnancy, each 10 nanogram per milliliter increase in preconception vitamin D was associated with a 12% lower risk of pregnancy loss.
- Vitamin D levels in the eighth week of pregnancy were not linked to pregnancy loss.
In 2010, the Food and Nutrition Board at the Institute of Medicine of the National Academies established that an adequate intake of vitamin D during pregnancy and lactation was 600 units per day. Most prenatal vitamins contain 400 units of vitamin D per tablet. So we encourage you to incorporate some of the following foods into your diet in addition to supplements. Foods that contain high levels of vitamin D include:
- Fatty fish like tuna, mackerel, halibut, trout and salmon
- Foods fortified with vitamin D like some dairy products, orange juice, soy milk and cereals.
- Beef liver
- Egg yolks
- Soy products
If you are concerned about your vitamin D levels, please contact Coastal Carolina OB/GYN for further testing.