Preterm births: now 12%, had been 8% (Vitamin D crash etc.)

Now 12% from 8% in 50 years Claude AI - Sept 2026

Vitamin D levels have been crashing

• Fewer preemies if higher Vitamin D
• Preterm birth rate reduced 60% by Vitamin D (40 ng)

• Preterm birth and low Vitamin D - many studies

• Birth rates are declining: 7 of the top 15 reasons are low Vitamin D

• While in labor, preterm birth delayed 6 days by Vitamin D (single dose of 50,000 IU) - RCT
• Preterm births reduced by Vitamin D - many studies
• Preterm birth rate increased in US but decreased in Finland (high Vitamin D)

Vitamin D recommended to reduce preterm births

• Endocrine Society (2024) recommended Vitamin D to prevent preterm births
• Vitamin D intervention reduces preterm births by 60 percent – Cochrane Reviews

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Omega-3 index has also fallen (less Omega-3 and increased Omega-6)

• Omega-3 index of 5 greatly decreases the risk of an early preterm birth
• Preterm birth rate cut in half with 1000 milligrams of Omega-3 (if initially low) – RCT
• Preterm Births decreased by Omega-3 (analysis of 184 countries)
• Omega-6 blocks Omega-3 etc. -many studies
• High levels of Omega-6 cut the benefits of Omega-3 in half
• Omega-3 index - many studies