Maternal circulating Vitamin D₃ levels during pregnancy and behaviour across childhood

Area of Science:

• Neuroscience
• Developmental Biology
• Public Health

Background:

• Vitamin D deficiency during critical developmental periods may cause lasting brain changes.
• Maternal vitamin D3 is the primary circulating form of vitamin D.
• Neurodevelopmental outcomes in children are a significant public health concern.

Purpose of the Study:

• To investigate the association between maternal vitamin D3 levels during pregnancy and child neurodevelopmental outcomes.
• To examine the impact on behavioral problems, Attention Deficit and Hyperactivity Disorder (ADHD) symptoms, Autism Spectrum Disorder (ASD) symptoms, and social competence.
• To understand the long-term effects of prenatal vitamin D exposure on child development.

Main Methods:

• A Spanish population-based birth cohort of 2,107 mother-child pairs was analyzed.
• Maternal plasma vitamin D3 was quantified during pregnancy.
• Neurodevelopmental outcomes were assessed via questionnaires at ages 5, 8, 14, and 18 years.
• Multivariate regression models were employed, adjusting for confounding variables.

Main Results:

• A 10 ng/mL increase in maternal vitamin D3 was associated with higher social competence scores in children at age 5 (coefficient = 0.77; 95% CI = 0.19, 1.35).
• No significant associations were observed between maternal vitamin D3 levels and overall behavioral problems, ADHD symptoms, or ASD symptoms from age 5 to 18.
• These findings suggest a specific link between prenatal vitamin D and early social development.

Conclusions:

• Maternal vitamin D3 levels during pregnancy may positively influence social competence in early childhood.
• The study found no significant link between maternal vitamin D3 and later behavioral issues, ADHD, or ASD symptoms.
• Further research in populations with lower vitamin D levels is warranted to confirm these findings.