Clinical trial Recruiting at 1 site Interventional Ages 18 to 45 Women only

Investigating the effects of iron supplementation on glucose metabolism during pregnancy

Official title: The Effect of Oral Iron Supplements on Hepcidin, Insulin and Glucose Metabolism in Pregnancy

Run by Swiss Federal Institute of Technology · NCT04008147 · Data updated 2026-11-12

This study is testing if taking iron supplements can help pregnant women with gestational diabetes and low iron levels manage their blood sugar better.

More Gestational Diabetes trials

Quick facts

Study typeInterventional
Ages18 Years to 45 Years
SexWomen only
Enrollment30 (estimated)
SponsorSwiss Federal Institute of Technology
Academic / other
Locations1 site (Zurich)
StatusRecruiting
StartedJuly 3, 2019
Main results expectedDecember 31, 2025
Study endsDecember 31, 2025
Registry record updatedMay 22, 2025
Trial IDNCT04008147 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are pregnant women between 24-28 weeks gestation with a pre-pregnancy BMI under 27.5 and hemoglobin levels above 8.0 g/dl.

Probably not a fit

Patients with severe anemia, recent iron infusion, or other medical conditions affecting iron metabolism may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This clinical trial examines the relationship between iron supplementation and glucose metabolism in pregnant women, specifically focusing on those with gestational diabetes and iron deficiency anemia. Participants will either refrain from taking iron supplements for 14 days or take a multivitamin containing iron while being monitored for changes in hepcidin levels and insulin sensitivity. The study aims to determine if high doses of oral iron can influence glucose metabolism and potentially impact pregnancy outcomes. The research is conducted at the Human Nutrition Laboratory ETH Zurich in collaboration with the University Hospital, Zürich.

Why it matters

Potential benefit: If successful, this study could lead to improved management strategies for gestational diabetes and iron deficiency during pregnancy, enhancing maternal and fetal health.

How similar studies have gone: While the specific approach of this study may be novel, previous research has indicated a complex relationship between iron metabolism and glucose regulation during pregnancy.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* week of pregnancy 24-28
* pre-pregnancy BMI \<27.5kg/m2
* singleton pregnancy
* Hb \> 8.0 g/dl

Willing to either:

* not take any iron supplements for 14 days (however, participants will receive a similar amount of total iron during the 4 study days that they would normally receive over 14 days) OR
* to take the multivitamin "Burgerstein Schwangerschaft and Stillzeit" supplements over the 14 days (contains 30 mg iron)

Exclusion Criteria:

* iron infusion within the past 6 months
* severely anemic Hb\<8.0g/dl
* acute or chronic disease
* long-term medication
* medical problems known to affect iron homeostasis
* smoking

Where it's running

  • Human Nutrition Laboratory ETH Zurich
    Zurich, Switzerland
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 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.