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Metformin in Gestational Diabetes Mellitus (MetGDM)

This study has been completed.
Information provided by (Responsible Party):
Agnieszka Zawiejska, MD, PhD, K. Marcinkowski University of Medical Sciences Identifier:
First received: May 19, 2008
Last updated: May 23, 2015
Last verified: May 2015

Gestational diabetes (GDM) is a condition that manifests as high blood sugar levels (hyperglycemia) during pregnancy in previously healthy women. It develops as a result of increased maternal body's resistance to insulin - a major hormone that allows for utilisation of glucose (sugar taken in with food) within cells. It was found out that GDM occurs more frequently in overweight women but also in women with a history of certain conditions such as polycystic ovary syndrome (PCOS). Usually, GDM disappears after pregnancy is completed but it is associated with some serious hazards for women and her unborn child, if untreated properly. Diet is a first-choice treatment but sometimes insulin therapy must be initiated if keeping a diet alone is not enough to maintain blood sugar within recommended values. Insulin therapy is effective but it requires several injections during each day and insulin is a strong acting hypoglycemic agent that may induce rapid falls in blood sugar, also dangerous for mother and unborn child.

In the investigators study, the investigators would like to investigate if metformin that is a commonly used hypoglycemic drug can be effectively used for GDM treatment. Metformin has been used successfully for a long time to treat type 2 diabetes mellitus and PCOS and, according to current data, it is not dangerous neither for mother nor for baby when used during gestation.

Condition Intervention
Diabetes, Gestational
Insulin Resistance
Drug: human recombined insulin
Drug: metformin

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: Effects of Insulin and/or Metformin Treatment on Perinatal Outcome and Metabolic Parameters in Women With Gestational Diabetes Mellitus: Prospective Randomized Trial.

Resource links provided by NLM:

Further study details as provided by K. Marcinkowski University of Medical Sciences:

Primary Outcome Measures:
  • newborn weight [ Time Frame: first hour of life ]

Secondary Outcome Measures:
  • parameters of metabolic control in mother and newborn, insulin resistance, inflammatory reaction, oxidative stress, fetal growth, [ Time Frame: during pregnancy and up to twelve hours after delivery ]

Enrollment: 78
Study Start Date: May 2008
Study Completion Date: May 2013
Primary Completion Date: April 2013 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: 1
gestational diabetes, insulin therapy
Drug: human recombined insulin
multiple injections protocol (functional intensive insulin therapy), variable doses following dietary conditions and current metabolic status
Experimental: 2
gestational diabetes, metformin therapy
Drug: metformin
pills given orally twice up to three times a day, a total daily dosage 1000-2400 mg


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • diabetes diagnosed during pregnancy
  • single pregnancy
  • ineffective diet therapy

Exclusion Criteria:

  • pregestational diabetes
  • fetal malformation
  • multiple pregnancy
  • contraindications to metformin therapy (liver or kidney disease)
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Please refer to this study by its identifier: NCT00681460

Div of Obstetrics and Women's Diseases, Dept of Obstetrics and Gynecology, K Marcinkowski Univ of Med Sciences
Poznan, Poland, 60-535
Sponsors and Collaborators
K. Marcinkowski University of Medical Sciences
Study Chair: Jacek Brazert, K Marcinkowski University of Med Sciences, Poznan, Poland
Study Director: Antoni J Duleba, University of California at Davis, Sacramento, CA, USA
  More Information

Responsible Party: Agnieszka Zawiejska, MD, PhD, Department of Obstetrics and Women's Diseases, Senior Lecturer, K. Marcinkowski University of Medical Sciences Identifier: NCT00681460     History of Changes
Other Study ID Numbers: KMUMS 705/07
Study First Received: May 19, 2008
Last Updated: May 23, 2015

Keywords provided by K. Marcinkowski University of Medical Sciences:
gestational diabetes
birth weight
fetal growth
insulin resistance
oxidative stress
inflammatory reaction
Fetal Development

Additional relevant MeSH terms:
Diabetes Mellitus
Insulin Resistance
Diabetes, Gestational
Glucose Metabolism Disorders
Metabolic Diseases
Endocrine System Diseases
Pregnancy Complications
Insulin, Globin Zinc
Hypoglycemic Agents
Physiological Effects of Drugs processed this record on April 26, 2017