1. A prospective study of nausea and vomiting during pregnancy;Gadsby;Br J Gen Pract,1993
2. Nausea and vomiting during pregnancy: A prospective study of its frequency, intensity, and patterns of change;Lacroix;Obstet Gynecol,2000
3. Nausea and vomiting in pregnancy: The problem of perception-Is it really a disease?;Miller;Obstet Gynecol,2002
4. Peripheral Nervous Pathways Involved in Nausea and Vomiting