What it is
Vitamin D is the sunshine vitamin. Your skin makes it from sun. Food gives a little: fatty fish, egg yolks, liver, fortified milk. In pregnancy it helps you absorb calcium for the baby's bones and teeth. Vitamin D levels are checked with a simple blood test.
What's typical
Low vitamin D is common. Studies find roughly 4 in 10 pregnant women in the U.S. are below the usual cutoff. It is more common in winter, in northern states, and in mothers with darker skin, who make less from the same sun. Symptoms of low D are vague: tiredness, aching bones, low mood. Many mothers have none.
What's known
ACOG says routine testing is not needed for every mother but is reasonable if you are at risk, and that correcting a low level is safe. Studies link low vitamin D in pregnancy with higher rates of preeclampsia and gestational diabetes, but trials correcting it show mixed results.
What helps
- Get outside midday for a short walk with arms uncovered, when the season allows. Darker skin needs more time.
- Ask for a vitamin D test at your first visit if you are often indoors, wear covering clothing, or have darker skin.
When to call someone
- Nownot an emergency topic.
- Todaya child swallows a bottle of vitamin D drops or pills. Call Poison Control, 1-800-222-1222.
- At your next visityou want a vitamin D test, you have had a low result before, or you have bone pain or muscle weakness.
Who helps
Related
- Supplements beyond the prenatal: what's worth asking aboutPregnancy: Eating
- Prenatal vitamins: when to start and what's in themBefore Pregnancy
- What to eat in pregnancy: the short versionPregnancy: Eating
- Depression during pregnancyPregnancy: Mind and Life
What mothers here say
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Sources
- American College of Obstetricians and Gynecologists — Vitamin D: screening and supplementation during pregnancy committee opinion
- NIH Office of Dietary Supplements — Vitamin D fact sheet for consumers
- Endocrine Society — Vitamin D clinical practice guideline
Sources are named, not yet linked. The steward verifies each one and adds the link.
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