What it is
Folate is a B vitamin. The baby's neural tube, which becomes the brain and spine, closes by about 28 days after conception. It needs folate to close well. Folic acid is the form in most prenatals and fortified flour. Methylfolate is a third form, already converted. MTHFR is a gene that affects how well your body converts folic acid.
What's typical
Most providers suggest folic acid from at least one month before conception through the first trimester. About 25 to 40 percent of people carry a common MTHFR variant. Most of them convert folic acid well enough. Online, MTHFR is often framed as a reason to switch to methylfolate. ACOG and the CDC say the variant alone is not a reason to test or switch. Some mothers choose methylfolate anyway.
What's known
The CDC says folic acid before conception cuts neural tube defect risk by up to 70 percent. Lily Nichols leans toward methylfolate plus food folate. ACOG and the CDC stand by folic acid as the studied form. Both agree: start early and keep taking it.
What helps
- Start your prenatal before you try, if you can. The window that matters comes before a missed period.
- Eat folate foods daily: lentils, beans, spinach, asparagus, avocado, oranges, liver.
When to call someone
- Nownot an emergency topic.
- Todayyou just learned you are pregnant and have not been taking folic acid. Call and ask; most providers say to begin right away.
- At your next visita past pregnancy with a neural tube defect, seizure medicine, or past weight-loss surgery.
Who helps
Related
- Prenatal vitamins: when to start and what's in themBefore Pregnancy
- Eating before you conceiveBefore Pregnancy
- Choline: the nutrient nobody mentionsPregnancy: Eating
- Trimester Zero: preparing your body before pregnancyBefore Pregnancy
What mothers here say
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Sources
- Centers for Disease Control and Prevention — MTHFR gene variant and folic acid facts
- American College of Obstetricians and Gynecologists — Neural tube defects practice bulletin
- Lily Nichols RDN — Real Food for Pregnancy
Sources are named, not yet linked. The steward verifies each one and adds the link.
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