1. First-trimester nausea and vomiting as related to outcome of pregnancy;Brandes;Obstet Gynecol,1967
2. Relationship between nausea and/or vomiting in early pregnancy and abortion;Medalie;Lancet,1957
3. Changes in tobacco smoking and ingestion of alcohol and caffeinated beverages during early pregnancy—are these consequences, in part, of feto-protective mechanisms diminishing maternal exposure to embryotoxins?;Hook,1976
4. Nausea and vomiting in pregnancy—a contribution to its epidemiology;Jarnfelt-Samsioe;Gynecol Obstet Invest,1983
5. Vomiting during pregnancy in Jerusalem women;Sterk;Isr J Med Sci,1971