Comparing daily and alternate day iron supplements for pregnant women with anemia

Oral Iron Supplementation on Alternate vs. Consecutive Days for Iron Deficiency Anemia in Pregnancy

Phase 4 Interventional Southern Illinois University · NCT06492512

This study tests whether taking iron supplements every day or every other day helps pregnant women with anemia feel better and improve their iron levels.

Quick facts

PhasePhase 4
Study typeInterventional
Enrollment120 (estimated)
Ages18 Years to 45 Years
SexFemale
SponsorSouthern Illinois University Academic / other
Locations1 site (Springfield, Illinois)
Trial IDNCT06492512 on ClinicalTrials.gov

What this trial studies

This randomized clinical trial aims to evaluate the effectiveness of oral iron supplementation in pregnant women diagnosed with iron-deficiency anemia (IDA). Participants will be randomly assigned to receive either daily or alternate day doses of ferrous sulfate, each containing 65 mg of elemental iron. Blood tests will be conducted at the beginning to confirm iron deficiency, and all supplements will be provided by the study team to ensure consistency. The study will also control for other iron sources by providing identical prenatal vitamins to both groups.

Who should consider this trial

Good fit: Ideal candidates are pregnant women under 30 weeks gestational age with laboratory-confirmed iron-deficiency anemia.

Not a fit: Patients with severe anemia requiring transfusions, other types of anemia, or certain gastrointestinal conditions may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could optimize iron supplementation strategies for pregnant women, potentially improving maternal and fetal health outcomes.

How similar studies have performed: Previous studies have explored iron supplementation in pregnancy, but this specific comparison of dosing schedules is less common and may provide novel insights.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Pregnant patients will be enrolled at less than 30 weeks gestational age (GA) with laboratory confirmed IDA (as defined by hemoglobin under 10.5 g/dL, as well as ferritin under 15 mcg/L)

Exclusion Criteria:

* Patients \<18 years old, patients who have severe IDA that requires blood transfusion or IV iron infusion, patients who have other known hemoglobinopathy (such as thalassemia or sickle cell anemia) or anemia of different mechanism (such as vitamin B12 or folate deficiency), patients with ulcerative colitis, Crohn's disease, gastric ulcers, patients who have previously undergone gastric bypass surgery, patients who experience admission for antepartum bleed, have been diagnosed with abnormal placentation (i.e., placenta previa, placenta accreta, placenta increta or percreta)

Where this trial is running

Springfield, Illinois

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Iron-deficiency AnemiaPregnancyIron-deficiency anemiaIron-deficiency anemia during gestation
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.