Actively Recruiting
Vitamin D Dynamics in Women
Led by Cornell University · Updated on 2026-04-01
160
Participants Needed
1
Research Sites
235 weeks
Total Duration
On this page
Sponsors
C
Cornell University
Lead Sponsor
U
University of Rochester
Collaborating Sponsor
AI-Summary
What this Trial Is About
The goal of this project is to utilize stable isotopically labeled vitamin D3 and state of the art mass spectrometric methodology to assess vitamin D dynamics during pregnancy in relation to relation to obesity and vitamin D binding protein genotype. At the conclusion of this study, the investigators will have obtained novel information on the absorption and utilization of vitamin D in women and the degree to which vitamin D utilization during pregnancy is impacted by genetic ancestry, vitamin D binding protein concentration and genotype and by excess adiposity. The long-term goal is to better understand the unique metabolism of vitamin D during pregnancy.
CONDITIONS
Official Title
Vitamin D Dynamics in Women
Who Can Participate
Eligibility Criteria
You may qualify if you...
- Self-reported White and Black women
- Age 20 to 39 years
- Body mass index (BMI) or pre-pregnancy BMI of either 18.5-24.9 kg/m2 or greater than or equal to 30 kg/m2
- Singleton pregnancy (for pregnant participants)
- Recruitment during first, second, or third trimester (for pregnant participants)
- No pregnancy complications (for pregnant participants)
You will not qualify if you...
- BMI or pre-pregnancy BMI less than 18.5 kg/m2
- Human immunodeficiency virus (HIV) infection
- Diagnosed eating disorder
- Malabsorption disease
- Diabetes
- Elevated diastolic blood pressure over 110 mm/Hg
- Steroid use
- Substance abuse history
- Current use of medications known to influence vitamin D or calcium homeostasis
- Plans to travel to lower latitude during the 20-day study period
- Plans to become pregnant during the study period (non-pregnant participants only)
- Refusal to discontinue tanning bed use during study period
- Refusal to discontinue vitamin or mineral supplement use during study period (non-pregnant participants only)
- Gestational diabetes (pregnant participants only)
- Pregnancy hypertension (pregnant participants only)
AI-Screening
AI-Powered Screening
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Trial Site Locations
Total: 1 location
1
University of Rochester, 518 Hylan Building
Rochester, New York, United States, 14627
Actively Recruiting
Research Team
K
Kimberly O. O'Brien, PhD
CONTACT
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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