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Description: Background Fetal Alcohol Spectrum Disorders (FASD) is an important global health problem in need of prevention. For FASD prevention it is important to understand why pregnant women engage or do not engage in drinking alcohol. It remains unknown which psychosocial determinants related to maternal alcohol consumption are most in need of prevention. The objective of this study was to identify these. Method We searched in PubMed, PsychINFO, PsychARTICLES, ERIC, CINAHL, EMBASE and MEDLINE databases up to May 2018 using an extensive query consisting of keywords related to pregnancy (e.g., maternal, prenatal), alcohol use (e.g., alcohol, drink) and determinants (e.g., attitude, norm). Studies were excluded when not published in English, were reviews, or involved non-human subjects. Substantial heterogeneity precluded aggregation or meta-analysis of the data. Instead, data were qualitatively inspected. Results A total of 23 studies including 150 identified items were eligible for data analysis. Studies covered over 15 psychosocial determinants (e.g., attitude, perceived social norm, risk perception). Studies differed in their operationalizations. As a majority of data was based on univariate analysis, little is known about the relationship with specific drinking behaviors. The majority of studies targeted perceived risk and motivation to comply with each social referents' approval or disapproval. A large proportion of studies focused on disadvantages and risks of maternal alcohol consumption. Results from these studies show that women do not continue to drink because the risks are unknown to them. Cautious interpretation is needed while the observed heterogeneity hindered firm conclusions. Conclusion We aimed to identify all relevant psychosocial determinants of maternal alcohol consumption behavior(s). The state of the literature precludes such conclusions. It remains unknown which determinants are most in need of intervention. It is recommended for future studies to (i) identify all possible psychosocial determinants of drinking during pregnancy using both quantitative and qualitative methods; (ii) include different target groups (e.g., women with unplanned pregnancies, pregnant women, women in childbearing age); (iii) identify key environmental agents; (iv) operationalize their measures based on theoretical models; (v) report specific variables such as the study method and association with behavior.