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Updated: Mar 28, 2026

Author Spotlight: Studying the Impact of Maternal Dietary Deficiencies on Long-Term Offspring Health Outcomes
Published on: June 28, 2024
Early pregnancy B vitamin status, one carbon metabolism, pregnancy outcome and child development
Pol Solé-Navais1, Pere Cavallé-Busquets2, Joan D Fernandez-Ballart1
1Area of Preventive Medicine and Public Health, Faculty of Medicine and Health Sciences, Universitat Rovira i Virgili (URV), IISPV, Spain; CIBER (CB06/03) ISCIII, Spain.
Insights
Periconception folic acid supplementation is crucial for preventing neural tube defects. Maternal folate and cobalamin status impact one-carbon metabolism, influencing fetal growth and pregnancy outcomes like birth weight and preterm birth risk.
Area of Science:
- Obstetrics and Gynecology
- Nutritional Science
- Biochemistry
Background:
- Periconception folic acid supplementation is recommended to prevent neural tube defects.
- Variations exist in folic acid dosage, timing, and duration during pregnancy.
- The review examines nutrient interactions and their impact on fetal development.
Purpose of the Study:
- To review the effects of periconception and pregnancy folate, cobalamin, and betaine status on one-carbon metabolism.
- To assess the influence of one-carbon metabolism on fetal growth and pregnancy outcomes.
- To analyze the impact of high-dose folic acid in mothers with low cobalamin status.
Main Methods:
- Review of prospective studies.
- Analysis of nutrient status (folate, cobalamin, betaine) during periconception and pregnancy.
- Examination of one-carbon metabolism markers, including homocysteine and dimethylglycine.
Main Results:
- Folic acid cessation post-first trimester leads to decreased folate status and increased betaine conversion to dimethylglycine.
- Low maternal folate status is linked to higher dimethylglycine production.
- Elevated homocysteine is associated with lower birth weight and intrauterine growth retardation.
- Low maternal folate status increases preterm birth risk.
Conclusions:
- Maternal nutrient status, particularly folate and cobalamin, significantly influences one-carbon metabolism.
- Disruptions in one-carbon metabolism can negatively affect fetal growth and increase risks for adverse pregnancy outcomes.
- Optimizing periconception and pregnancy nutrition is vital for healthy fetal development and successful pregnancy outcomes.
Abstract:
Periconception supplementation with folic acid is recommended until 12 gestational weeks to prevent neural tube defects. Doses of folic acid contained in supplements and timing and length of use during pregnancy vary. The effects of status in periconception and pregnancy folate, cobalamin, betaine and their interactions on one carbon metabolism (1C), as well as the global effect of 1C on foetal growth and pregnancy outcome, are reviewed. Results from prospective studies are reviewed. Cessation of folic acid supplement use after the first trimester is associated with a sharp drop in plasma folate status and enhanced conversion of betaine to dimethylglycine. Dimethylglycine production is also higher in mothers with low folate status than in those with normal-high folate status. The effects of high doses of folic acid on one carbon metabolism in mothers with low early pregnancy cobalamin status and on foetal growth are also reviewed. Several studies report that moderately elevated early pregnancy fasting plasma total homocysteine (tHcy) is inversely associated with birth weight and a predictor of intrauterine growth retardation. There is also evidence for increased risk of preterm birth when maternal folate status is low.
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