1. Hyperemesis during pregnancy and delivery outcome: a registry study;Kallen;Eur J Obstet Gynecol Reprod Biol,1987
2. Total parenteral nutrition for treatment of severe hyperemesis gravidarum: maternal nutritional effects and fetal outcome;Levine;Obstet Gynecol,1988
3. Nausea and vomiting during pregnancy;Fairweather;Obstet Gynecol Annu,1978
4. Hyperemesis Gravidarum;Abell;Gastroenterol Clin North Am,1992