Dietary and psychosocial correlates of nausea and vomiting in pregnancy

•We test the relationship between NVP and consumption of different foods.•We found an association between NVP symptoms and alcohol, cereals, and milk consumption.•Women with a current higher level of NVP consume less milk products and alcohol.•Women with a current lower level of NVP consume more cereals.•Women consume less milk and sugar in early than later pregnancy. Nausea and vomiting during pregnancy (NVP) is a condition that affects women around the world. Previous studies show that NVP is associated with dietary changes and aversions towards certain kinds of food. It has been suggested that these changes could have adaptive functions, such as protecting the embryo from harmful teratogenic substances in certain foods. Here, we used a food frequency questionnaire to record self-reported frequency of consumption of a range of specific food categories by 726 pregnant women. We tested whether the incidence and severity of NVP symptoms varied between women who consumed foods in each category, as well as investigating several potential psychosocial predictors. We found evidence for an association between alcohol, cereals, and (especially) milk consumption on the experience of NVP symptoms. In addition, NVP symptoms were positively correlated with women's self-reported fatigue, stress, and depression, but negatively correlated with perceived level of support from the woman's partner. Finally, NVP symptoms were also associated with use of oral contraceptives during partner choice and we discuss possible reasons for this. Overall, our results contribute to a growing body of evidence for complex and multifactorial effects on the experience of NVP, of which dietary patterns may be a critical component.