Actively Recruiting

Age: 18Years - 50Years
FEMALE
ID07517406

Predictive Value of Glycemic Markers for Gestational Diabetes and Pregnancy Complications in Women With Prior Bariatric Surgery Who Cannot Tolerate Oral Glucose Testing

Led by Burak Deniz Aydoğdu · Updated on 2026-04-08

84

Participants Needed

1

Research Sites

N/A

Total Duration

On this page

AI-Summary

What this Trial Is About

Gestational diabetes mellitus (GDM) is a common complication during pregnancy that can lead to serious health problems for both mother and baby. This research focuses on pregnant women aged 18 to 50 years who have previously undergone bariatric surgery. The study aims to find out if common blood and urine sugar tests taken during pregnancy can help predict GDM and related complications like large birth weight and excess amniotic fluid, especially in women who have difficulty tolerating the standard glucose test due to side effects from their surgery. Participants will be grouped based on their ability to tolerate the standard 75-gram oral glucose tolerance test (OGTT). Those who complete the OGTT will be compared to those who cannot tolerate or refuse it. Researchers will measure fasting blood sugar, blood sugar after meals, HbA1c, and urine glucose levels during pregnancy. Ultrasound scans in the second and third trimesters will also be performed to assess pregnancy progress and potential complications. Throughout the pregnancy, participants will have routine blood and urine tests, ultrasound scans, and clinical follow-ups until delivery. Researchers will observe the development of GDM between 24 and 28 weeks of pregnancy and monitor for complications like polyhydramnios until birth. Statistical analysis will evaluate how well these routine glycemic markers predict GDM and other pregnancy outcomes in this specific group of women.

CONDITIONS

Brief Title

Glycemic Markers for Predicting Gestational Diabetes in Pregnant Women With Previous Bariatric Surgery

Who Can Participate

Age: 18Years - 50Years
FEMALE

Eligibility Criteria

Eligible

You may qualify if you...

  • Pregnant women aged 18 to 50 years
  • Singleton pregnancy
  • History of bariatric surgery before pregnancy
  • Receiving care at Prof. Dr. Cemil Ta5F31olu City Hospital, Department of Obstetrics and Gynecology
  • Availability of blood sugar and urinary glucose measurements during early pregnancy (up to 14 weeks) and/or between 24 and 28 weeks
  • Availability of ultrasound and clinical follow-up data between 28 weeks of gestation and delivery (up to 40 weeks)
Not Eligible

You will not qualify if you...

  • Age younger than 18 years or older than 50 years
  • Multiple pregnancy (twins or more)
  • Known chronic systemic diseases such as pre-existing diabetes or endocrine disorders
  • Incomplete or missing clinical data

AI-Screening

AI-Powered Screening

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Your Study Journey

Screening

Duration - 2 to 4 weeks

Participants are screened for eligibility to participate in the trial.

1 visit (in-person)

Monitoring

Duration - From early pregnancy (up to 14 weeks) through 40 weeks of gestation

Participants are observed through routine antenatal care with collection of glycemic markers including fasting plasma glucose, postprandial glucose, HbA1c levels, and urinary glucose measurements.

Regular antenatal visits as per routine care

Ultrasound Assessments

Duration - Between 24 and 40 weeks of gestation

Participants undergo ultrasound examinations during the second and third trimesters to monitor pregnancy progress and identify complications such as polyhydramnios and macrosomia.

At least 2 visits during second and third trimesters

Pregnancy Outcome Follow-up

Duration - Until delivery (up to 40 weeks)

Participants’ pregnancy outcomes including diagnosis of gestational diabetes mellitus (GDM), macrosomia, and polyhydramnios are recorded until delivery.

Follow-up visits as part of routine care until delivery

Trial Site Locations

Total: 1 location

1

Prof. Dr. Cemil Taşcıoğlu City Hospital

Istanbul, Şişli, Turkey (Türkiye), 34384

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Research Team

B

Burak Deniz AYDOĞDU, MD

How is the study designed?

Study Type

OBSERVATIONAL

Masking

N/A

Allocation

N/A

Model

N/A

Primary Purpose

N/A

Number of Arms

2

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