Vitamin B12 Supplementation During Pregnancy on Cognitive Development (VitaPreg)
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|ClinicalTrials.gov Identifier: NCT03071666|
Recruitment Status : Active, not recruiting
First Posted : March 7, 2017
Last Update Posted : January 26, 2021
Scientific basis: Globally, vitamin B12 deficiency is one of the most common micronutrient deficiencies. The only relevant source of vitamin B12 is animal-source foods and poor gut function may decrease absorption. Vitamin B12 is crucial for normal cell division and differentiation, and necessary for the development and myelination of the central nervous system. Deficiency is also associated with impaired fetal and infant growth. In the proposed study we will measure the effect of daily oral vitamin B12 supplementation to pregnant women on neurodevelopment and growth of their children. We also aim to measure the impact of B12 supplementation on several other outcomes.
Study design: Individually randomized double-blind placebo controlled trial in pregnant South Asian women at risk of poor vitamin B12 status. Participants will be randomized in a 1:1 ratio.
Study participants and site: 800 pregnant women from early pregnancy. Women will be enrolled as early as possible, but no later than in week 15 of pregnancy.
Intervention: Daily administration of 50 µg of vitamin B12 from early pregnancy until 6 months after birth.
Comparator: Placebo, identical to the vitamin B12 supplements.
Outcomes: Primary: (i) neurodevelopment in children measured at 6 and 12 months of age (ii) growth in children measured by weight and length at 12 months. Secondary: (i) neurodevelopment and cognitive functioning in children at 24 months (ii) gestational age at birth, (iii) fetal and infant growth measured by weight and length at birth, after 1 month and then at 3, 6, 9, and 24 months, (iv) hemoglobin concentration in children and mothers.
Relevance for programs and public health: The results from this study can suggest new dietary guidelines for South Asian women that again can lead to improved pregnancy outcomes and neurodevelopment and cognitive functioning in South Asian children.
|Condition or disease||Intervention/treatment||Phase|
|Pregnancy Related Vitamin B 12 Deficiency Anemia||Dietary Supplement: cobalamin Dietary Supplement: placebo||Phase 2 Phase 3|
Cobalamin (Vitamin B12) deficiency is common in many low- and middle-income countries. This is not surprising as the main source of vitamin B12 is animal source foods, which are expensive and for cultural and religious reasons often not eaten at all. We have in several studies in women and children demonstrated that poor vitamin B12 status is common in South Asia. There is also compelling evidence that vitamin B12 deficiency occurs frequently in many other settings including pregnant women .
Case studies have demonstrated harmful effects of severe vitamin B12 deficiency on the developing infant brain.The consequences of mild or subclinical vitamin deficiency are less clear but it has been shown to be associated with decreased cognitive performance in both elderly and children.
Three randomized controlled trials (RCT) have measured the effect of vitamin B12 supplementation on neurodevelopment in children: In a Norwegian trial, an intramuscular injection of B12 substantially improved motor development in six weeks old infants after one month. Another intervention study in low birth weight children in Norway recently confirmed these findings. The infants in these studies had evidence of suboptimal vitamin B12 status, but none were severely deficient. We found a beneficial effect of vitamin B12 supplementation for six months on neurodevelopment in young North Indian children.
During pregnancy, vitamin B12 is concentrated in the fetus and stored in the liver. Infants born to vitamin B12-replete mothers have stores of vitamin B12 that are adequate to sustain them for the first several months postpartum. Consequently, vitamin B12 deficiency rarely occurs before the infant is about four months old if the mother has adequate vitamin B12 status during pregnancy. However, many infants of vitamin B12-deficient breastfeeding mothers are vulnerable to B12 deficiency from an early age.
In this project we will randomise Nepalese women to receive a supplement containing 50µg cobalamin or a placebo from early pregnancy until 6 months postpartum.
Hypothesis to be tested
Principal hypothesis: Daily administration of vitamin B12 to pregnant women from early pregnancy until 6 months postpartum will:
- Increase the scores of the Bayley Scales of Infant and Toddler Development, 3rd ed. (Bayley-III) by 0.25 SD points measured at 6 and 12 months of age.
- Increase length for age and weight for length by 0.2 z-scores at 12 months of age.
Other hypotheses to be tested (dependent on additional funding):
- Daily maternal administration of vitamin B12 from the start of the early pregnancy and for 6 months postpartum improves the hemoglobin concentration in the mother and infant.
- Daily maternal administration of vitamin B12 from early pregnancy and for 6 months postpartum improves plasma vitamin B12 concentration and reduces plasma total homocysteine and methylmalonic acid concentration in the mother and infant.
- Daily maternal administration of vitamin B12 from early pregnancy and for 6 months postpartum improves insulin sensitivity in the offspring.
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||800 participants|
|Intervention Model:||Parallel Assignment|
|Masking:||Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)|
|Masking Description:||We will randomize women in a 1:1 ratio. The vitamin B12 supplements and the placebos will be produced specifically for this trial and be identical in taste and appearance. Each woman will be assigned a packet of medicines according to her id number. This packet will only be labeled with general information about the study and a unique id number. The list that links the id number to the randomization code will be kept with the company that produces the intervention and the placebo, and with the scientist who will generate the randomization code. This scientist will otherwise not be involved in the study. None of the investigators will have access to this list until completion of data collection and cleaning of data for the main outcomes.|
|Official Title:||Supplementation of Vitamin B12 in Pregnancy and Postpartum on Growth and Cognitive Functioning in Early Childhood: A Randomized, Placebo Controlled Trial|
|Actual Study Start Date :||March 27, 2017|
|Estimated Primary Completion Date :||June 28, 2022|
|Estimated Study Completion Date :||December 31, 2024|
Experimental: Vitamin B12
cobalamin, 50 µg per day throughout pregnancy and during the first 6 months postpartum.
Dietary Supplement: cobalamin
Vitamin supplment tablet containing 50µg cobalamin
Other Name: Vitamin B12
Placebo Comparator: Placebo
Identical taste and appearance with the Experimental arm. Contains no cobalamin
Dietary Supplement: placebo
A tablet identical to the vitamin supplement but containing no vitamin B12
- Length [ Time Frame: 12 first months of life ]Length measured in centimeters
- Neurodevelopment [ Time Frame: 12 first months of life ]Infant Scores of the Bayley Scales of Infant Development version 3
- Weight [ Time Frame: 12 first months of life ]Weight measured in kilograms
- Child hemoglobin concentration [ Time Frame: 12 first months of life ]Hemoglobin measured by hemocue in full blood
- Child development [ Time Frame: 12 first months of life ]Infant scores of the Ages and Stages Questionnaire - 3rd ed.
- Heart rate variability [ Time Frame: 12 first months of life ]Heart rate variability or vagal tone
- Sleep and activity [ Time Frame: 12 first months of life ]Sleep and activity measured by Actigraph (Actiwatch)
- The Infant Motor Performance [ Time Frame: 2 months after birth ]Screening tool to assess motor development
- Still births [ Time Frame: Birth. ]Number of still births
- Maternal hemoglobin concentration [ Time Frame: Birth. ]Hemoglobin measured by hemocue in full blood
- Number of complicated births [ Time Frame: Birth. ]Number of births that were complicated
- Children born at small for gestational age [ Time Frame: Birth ]Number of children born at small for gestational age
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): NCT03071666
|Bhaktapur, Nepal, P.O.Box 40|
|Principal Investigator:||Tor A Strand, MD/PhD||University of Bergen|
|Principal Investigator:||Laxman Shestha, MD||Tribhuvan University|
|Principal Investigator:||Ram K Chandyo, MD/PhD||Kathmandu University|