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Vitamin D during pregnancy

Vitamin D enhances calcium absorption and supports fetal immune and skeletal development during pregnancy.

Definition

A fat-soluble vitamin essential for calcium absorption and immune function during pregnancy. The recommended intake is 600 IU daily, with some experts suggesting higher amounts based on individual assessment.

How it works

Vitamin D acts as a hormone in the body, regulating calcium absorption and immune function—both critical during pregnancy. The fetus depends on maternal vitamin D for bone mineralization and immune system development. Deficiency during pregnancy is associated with increased risk of gestational diabetes, preeclampsia, and bacterial vaginosis. Unlike many vitamins, vitamin D is produced endogenously when skin is exposed to sunlight, making geographic location and season significant factors in status. Pregnant women with limited sun exposure, darker skin tones, or dietary restrictions should consider supplementation after assessment.

Role

Facilitates calcium absorption and supports fetal immune development and bone mineralization.

Examples

  • Fatty fish
  • Egg yolks
  • Fortified milk
  • Mushrooms exposed to sunlight
  • Vitamin D supplements
  • Sunlight exposure

Recommendations

Maintain vitamin D levels of 30-50 ng/mL through combined dietary sources, sun exposure, and supplementation if needed. Discuss vitamin D testing and supplementation with your healthcare provider, particularly if you have limited sun exposure. Choose fortified foods and consider supplements during winter months or in regions with limited sunlight.

Key takeaway

Adequate vitamin D during pregnancy supports calcium absorption and reduces risk of gestational complications.

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