1. Maternal and fetal medicine, folic acid for the prevention of recurrent neural tube defects;ACOG Committee on Obstetrics;Intern. J. Gynecol. Obstet,1993
2. Committee on Obstetrics: Maternal and fetal medicine. Vitamin A supplementation during pregnancy;ACOG Committee Opinion;Intern. J Gynecol. Obstet,1993
3. Ernährungsprävention während der Schwangerschaft. Dtsch;Bergmann;Ärztebl,1997
4. Effect of a low-fat high-carbohydrate diet on symptoms of cyclical mastopathy;Boyd;Lancet,1988
5. Calcium supplementation during pregnancy: a systematic review of randomised controlled trials;Carroli;Brit. J. Obstet. Gynecol,1994