Schulz, Christiane Vitamin A and beta-carotene supply of women with gemini or short birth intervals: a pilot study. [electronic resource] - European journal of nutrition Feb 2007 - 12-20 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't ISSN: 1436-6207 Standard No.: 10.1007/s00394-006-0624-9 doi Subjects--Topical Terms: AdultBirth IntervalsChromatography, High Pressure Liquid--methodsColostrum--chemistryCross-Sectional StudiesDietDietary SupplementsFemaleFetal Blood--chemistryHumansInfant, NewbornMaternal Nutritional Physiological Phenomena--physiologyNutrition PolicyNutritional RequirementsNutritional StatusPilot ProjectsPregnancy--bloodSocioeconomic FactorsVitamin A--administration & dosagebeta Carotene--administration & dosage