Pregnancy check
Should I be tested for iron deficiency or take iron in pregnancy?
The body needs more iron during pregnancy, and iron deficiency is the leading cause of anemia in pregnancy. The US Preventive Services Task Force looked at testing and routine iron supplements for pregnant people with no symptoms. Check what it says for you.
About you
For people who are pregnant now. Nothing you enter leaves this page.
What you will see
What the USPSTF says about iron testing and supplements in pregnancy for you.
Educational only, not medical advice. This is not a blood test. Follow your prenatal care team's advice on iron.
Source
US Preventive Services Task Force, August 2024 recommendation on screening and supplementation for iron deficiency and iron deficiency anemia during pregnancy. It is the current statement.
Validated in
Pregnant adolescents and adults without symptoms of iron deficiency or anemia.
Limits
It cannot tell you your iron level. It does not cover severe malnutrition, symptoms, or blood conditions or nutritional deficiencies that raise iron needs.
What the USPSTF recommends
| Who | Recommendation | Grade |
|---|---|---|
| Pregnant adolescents and adults without symptoms | Evidence is insufficient to weigh the benefits and harms of screening for iron deficiency and iron deficiency anemia | I |
| Pregnant adolescents and adults without symptoms | Evidence is insufficient to weigh the benefits and harms of routine iron supplementation | I |
The 2024 statement matches the 2015 one. Screening usually means a blood test such as hemoglobin, hematocrit or ferritin, followed by iron treatment if the result is abnormal. Supplementation means routine low-dose iron or iron-fortified foods without testing first (USPSTF 2024). Other groups' guidelines vary, both practices are common, and clinicians are asked to use their judgment (USPSTF 2024).
Why it matters
Iron is needed to make hemoglobin, the protein in blood that carries oxygen. Iron deficiency means the body's iron stores are depleted, and it can progress to iron deficiency anemia (USPSTF 2024). US survey data from 1999 to 2006 put iron deficiency in pregnancy near 18%, rising across the three trimesters from 6.9% to 14.3% to 28.4%; an estimated 5% of pregnant people have iron deficiency anemia (USPSTF 2024). Black and Mexican American pregnant people are disproportionately affected by iron deficiency anemia (USPSTF 2024).
Why the evidence falls short
The review found no evidence on whether screening and treating iron deficiency found by screening improves health outcomes for parent or baby (USPSTF 2024). For routine supplements, the evidence on maternal and infant health outcomes was also inadequate (USPSTF 2024). Screening is unlikely to cause serious harms, though evidence is limited. Iron supplements or treatment commonly cause stomach and gut effects such as nausea, constipation, abdominal pain and vomiting (USPSTF 2024).
Common questions
What raises the risk?
Commonly cited risk factors include a diet low in iron-rich foods (for example, a vegan diet without enough iron sources), stomach or gut conditions or medicines that reduce iron absorption (such as antacids), and a short gap between pregnancies. The USPSTF found limited evidence that questionnaires or risk tools can pick out who is at higher risk (USPSTF 2024).
Can smoking or altitude affect the test?
Yes. Tobacco use and living at high altitude can raise hemoglobin and hematocrit values, which affects how results are read (USPSTF 2024).
Is there an agreed cutoff for iron deficiency?
No. Ferritin can be measured to confirm iron deficiency, but there is no consensus on the exact level that indicates it (USPSTF 2024).
Also see the folic acid check, the pregnancy weight gain calculator and all screening tests by age.
Sources
- US Preventive Services Task Force. Screening and Supplementation for Iron Deficiency and Iron Deficiency Anemia During Pregnancy: US Preventive Services Task Force Recommendation Statement. JAMA. 2024;332(11):906-913. www.uspreventiveservicestaskforce.org/uspstf/recommendation/iron-deficiency-anemia-in-pregnant-women-screening-and-supplementation
Written and maintained by the uncovermyrisk.com editorial team. We do not have a medical reviewer; every claim links to its primary source above. Last reviewed: 2026-10-30. Spotted an error? See About.