Little sun in first trimester, 2.9 X more likely to have learning disabilities

Antenatal exposure to solar radiation and learning disabilities: Population cohort study of 422,512 children

Scientific Reports volume 9, Article number: 9356 (2019)

Claire E. Hastie, Daniel F. Mackay, Tom L. Clemens, Mark P. C. Cherrie, Albert King, Chris Dibben & Jill P. Pell

It is extremely important to get Sun, UVB, or at least Vitamin D before and during pregnancies Note: This study is based on maxium possible ambient UVB during pregnancies and NOT 1) How much UVB was stopped by air pollution 2) How much UVB was stopped by clouds 3) How much UVB was stopped by clothes 4) How much much UVB was stopped by dark skin color 5) How much Vitamin D was lost due to obesity * Low Vitamin D if low UV (Pregnant Japanese, 2012) – March 2019 * Conception in winter increases rate of Autism, learning disabilities, dyslexia – Oct 2016 * Poor cognition 26 percent more likely if low Vitamin D (29 studies) – meta-analysis July 2017 ADHD * ADHD, Autism, Early Psychosis and Omega-3 – review Dec 2017 * ADHD 2 times more likely if poor Omega-6 to Omega-3 ratio – meta-analysis May 2016 * ADHD decreased by 11% for each 10 ng increase in vitamin D in early pregnancy – April 2015 * Increased risk of ADHD (28 pct.) and Autism (58 pct.) if low vitamin D during pregnancy – meta-analysis Jan 2019 Autism * Autism risk reduced 2X by prenatal vitamins (Vitamin D or Folic) – Feb 2019 * Autism is the least in regions having the most sunshine (and vitamin D) – Nov 2017 * Health problems are related to birth month - June 2015 * Vitamin D and autism - treat: 300 IU per kg per day, prevent: during pregnancy 5,000 IU – Feb 2017 1. VitaminDWiki – Season of Birth category contains: {include} * Diseases correlated to month of birth – 2008 has the following chart Brain Development starts in first trimester Ensure a healthy pregnancy and baby - take Vitamin D before conception has the following

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Raw Data

First Timester portion of UVB table with annotations

Entire UVB Chart

Learning disability varies by month of conception. The underlying mechanism is unknown but vitamin D, necessary for normal brain development, is commonly deficient over winter in high latitude countries due to insufficient ultraviolet radiation. We linked the 2007–2016 Scottish School Pupil Censuses to Scottish maternity records and to sunshine hours and antenatal ultraviolet A/B radiation exposure derived from weather stations and satellites respectively. Logistic regression analyses were used to explore the associations between solar radiation, then ultraviolet B, and learning disabilities, adjusting for the potential confounding effects of month of conception and sex. Of the 422,512 eligible, singleton schoolchildren born at term in Scotland, 79,616 (18.8%) had a learning disability. Total antenatal sunshine hours (highest quintile; adjusted OR 0.89; 95% CI: 0.86, 0.93; p < 0.001) and ultraviolet B exposure (highest quintile; adjusted OR 0.55; 95% CI: 0.51, 0.60; p < 0.001) were inversely associated with learning disabilities with evidence of a dose-relationship. The latter association was independent of ultraviolet A exposure. Significant associations were demonstrated for exposure in all three trimesters. Low maternal exposure to ultraviolet B radiation may play a role in the seasonal patterning of learning disabilities. Further studies are required to corroborate findings and determine the effectiveness of supplements.

No statisitically significant relationship between low 1st trimester D levels and Leaning disorders - Sept 2021

Prenatal Vitamin D Levels in Maternal Sera and Offspring Specific Learning Disorders

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1996, only about 10% had > 30 ng