Sufficient Preconception Vitamin D Tied to Lower Miscarriage Risk However, increased vitamin D levels in early pregnancy not correlated with reduced pregnancy loss Preconception vitamin D levels may play a role in maintaining pregnancy, according to a study published recently in The Lancet Diabetes & Endocrinology. Sunni Mumford, Ph.D., from the National Institutes of Health in … Continue reading PRECONCEPTION VITAMIN D REDUCED MISCARIAGE RISK