Fertility and Sterility · 2013 · 10 citations · 0 references
MedicineMaternal HealthObstetricsFertilityMaternal-fetal MedicineReproductive HealthContraceptive EffectivenessContraceptive EfficacyMicronutrient SupplementationPregnancyVitamin D DeficiencyVitamin SupplementationDouble-blind TrialsMaternal Vitamin D StatusPregnancy Vitamin D SupplementationVitamin D Deficiency Treatment