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Vitamin D in Pregnancy and Lactation

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ClinicalTrials.gov Identifier: NCT01112891
Recruitment Status : Completed
First Posted : April 29, 2010
Last Update Posted : December 16, 2014
Sponsor:
Collaborator:
Canadian Institutes of Health Research (CIHR)
Information provided by (Responsible Party):
University of British Columbia

Brief Summary:
Background: Vitamin D is vital throughout pregnancy and lactation for both maternal and infant health. Health Canada recommends women take the AI of 5ug/day of vitamin D during pregnancy, however, it is unknown how much vitamin D is necessary to ensure both mother and baby reach a vitamin D serum concentration of 25OHD>75nmol/L.

Condition or disease Intervention/treatment Phase
Vitamin D Deficiency Drug: Vitamin D Drug: Vitamin D3 Phase 4

Detailed Description:

Purpose & Hypothesis: This project aims to determine maternal and infant responses vitamin D supplementation in pregnancy and lactation. It is hypothesized that the current AI of 5 μg of vitamin D will be inadequate for women and their infants in Canada to achieve optimal 25OHD concentrations (> 75nmol/L).

Methods: Healthy pregnant women between 18-42 years of age without history of pregnancy complications will be recruited for a double-blind, randomized, controlled trial where they will receive one of three different dosages of vitamin D (10, 25 and 50ug/day) as part of a standard prenatal vitamin. The study at 18 plus/minus 3 weeks gestation and will carry on throughout pregnancy and lactation. Mother and infant vitamin D levels in breast milk and blood will be measured at regular intervals. Skin colour will be measured via light reflectometry. Bone biomarkers such as plasma osteocalcin and urinary n-telopeptide will be assessed. Dietary vitamin D intake and sun exposure will be estimated using a food frequency and lifestyle questionnaire. Data will be analyzed using multiple regression analysis controlling for baseline values.

Expected Results & Conclusions: It is expected that greater vitamin D intakes (25, 50ug/day) will be necessary to raise maternal and infant serum concentrations to 25OHD>75nmol/L to avoid infant supplementation. This data will aid policy makers, mothers and healthcare workers in recommended and appropriate vitamin D dosage throughout pregnancy and lactation.


Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 225 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double (Participant, Investigator)
Primary Purpose: Prevention
Official Title: Vitamin D Dose-response Study Throughout Pregnancy and Lactation
Study Start Date : March 2010
Actual Primary Completion Date : August 2012
Actual Study Completion Date : February 2013

Resource links provided by the National Library of Medicine

Drug Information available for: Vitamin D
U.S. FDA Resources

Arm Intervention/treatment
Experimental: 1 Drug: Vitamin D
10 ug/day Vitamin D as part of standard pre-natal vitamin supplement, taken from 18 weeks gestation to 6 months postpartum.
Experimental: 2 Drug: Vitamin D3
25 ug/day Vitamin D as part of standard pre-natal vitamin supplement, taken from 18 weeks gestation to 6 months postpartum.
Experimental: 3 Drug: Vitamin D
50 ug/day Vitamin D as part of standard pre-natal vitamin supplement, taken from 18 weeks gestation to 6 months postpartum.



Primary Outcome Measures :
  1. 25(OH)D Plasma Concentrations [ Time Frame: 18 weeks gestation for mother ]
  2. 25(OH)D Plasma Concentrations [ Time Frame: 28 weeks gestation for mother ]
  3. 25(OH)D Plasma Concentrations [ Time Frame: 36 weeks gestation for mother ]
  4. 25(OH)D Plasma Concentrations [ Time Frame: 16 weeks post-partum for mother & infant ]


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Ages Eligible for Study:   18 Years to 42 Years   (Adult)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • Women between 18-42 years of age
  • within 18 plus/minus 3 weeks gestation
  • planning to breastfeed their infant
  • a singleton pregnancy

Exclusion Criteria:

  • Any co-morbid condition such pre-gestational diabetes, TB, cardiac or renal disease, HIV/AIDS, chronic hypertension, inflammatory bowel disease, autoimmune disease, liver disease, or epilepsy; conditions associated with vitamin D malabsorption: celiac disease, gastric bypass;
  • History of previous adverse pregnancy outcome [preterm delivery <37; weeks GA, stillbirth, severe pre-eclampsia, eclampsia, HELLP syndrome (hemolytic anemia, elevated liver enzymes, and low platelet count)];
  • Women will also be ineligible if they are taking more than 10 µg day supplemental vitamin D or drugs known to interfere with vitamin D metabolism (i.e corticosteroids).

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01112891


Locations
Canada, British Columbia
BC Children's Hospital
Vancouver, British Columbia, Canada, V6H 3V4
Sponsors and Collaborators
University of British Columbia
Canadian Institutes of Health Research (CIHR)
Investigators
Principal Investigator: Tim Green, Dr. University of British Columbia
Study Director: Sheila M. Innis, Dr. University of British Columbia
Study Director: Michael R. Lyon, MD University of British Columbia
Study Director: Antonia W. Shand, Dr University of British Columbia
Study Director: Peter von Dadelszen, MD University of British Columbia
Study Chair: Russ Freisen, MSc University of British Columbia
Study Chair: Kaitlin March University of British Columbia
Study Chair: Tina Li University of British Columbia

Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
Responsible Party: University of British Columbia
ClinicalTrials.gov Identifier: NCT01112891     History of Changes
Other Study ID Numbers: H09-01261
F08-03892 ( Other Grant/Funding Number: CIHR )
First Posted: April 29, 2010    Key Record Dates
Last Update Posted: December 16, 2014
Last Verified: December 2014

Keywords provided by University of British Columbia:
Vitamin D
Infant
Lactation
Dose-Response

Additional relevant MeSH terms:
Vitamin D Deficiency
Avitaminosis
Deficiency Diseases
Malnutrition
Nutrition Disorders
Vitamins
Vitamin D
Ergocalciferols
Micronutrients
Growth Substances
Physiological Effects of Drugs
Bone Density Conservation Agents