The effects of intravenously administered water-soluble vitamins during labor in normovitaminemic and hypovitaminemic gravidas on maternal and neonatal blood vitamin levels at delivery

Data are presented for transfer of thiamin, pyridoxine, vitamin B12, folate, vitamin C, riboflavin, niacinamide, biotin, and pantothenate from the gravida to the fetus at various times following the intravenous administration of a load dose of these vitamins to the gravida during labor. Evidence points to an avidity for vitamins by the neonatal circulation even in the face of the maternal hypovitaminemia.