January 21, 2026
Vitamin D Study Shows 87% Higher Live Births in Infertile Women
A Danish study found that infertile women exposed to vitamin D fortification had an 87% higher live birth rate compared to those after the program. The transitional period showed a 52% increase, linking even small vitamin D boosts to fertility improvements.
Key Takeaways
Vitamin D Fortification and Live Births: 87% Increase in Danish Women
Women in Denmark during mandatory vitamin D fortification (1980s-1990s) had 87% higher live birth rates compared to those outside the program, according to a study of over 16,000 infertile women.
Transitional Period Shows 52% Live Birth Rate Boost for Infertile Women
During the ‘wash-out’ phase of vitamin D supplementation, infertile women still experienced a 52% higher chance of live birth, suggesting even reduced exposure improves fertility outcomes.
Dietary Vitamin D Critical for Conception Success
The study highlights dietary vitamin D (via fortified foods) as a key factor in fertility, with population-wide supplementation directly correlating to improved live birth statistics.
Fertility Centers Recommend Daily Vitamin D Supplementation
Based on these findings, clinics like Fertility Centers of New England now recommend routine vitamin D supplementation for patients undergoing infertility treatments.
Vitamin D Role in Pregnancy: Study Confirms Long-Term Benefits
The 16,000-woman study spanning 1980-1991 provides robust evidence supporting vitamin D’s physiological role in fertility, prompting ongoing research into optimal dosage and timing.
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