Background. When other weight loss attempts have failed, bariatric surgery offers a successful alternative against obesity. Since operations are performed during women´s reproductive years, the number of pregnant women with prior bariatric surgery is increasing. Bariatric surgery results in restriction of food intake and/or malabsorption leading to weight loss, but may induce a risk for malnutrition and pregnancy complications. Method. Systematically conducted review addressing pregnancy after bariatric surgery using the PubMed and Cochrane databases. Main Outcome Measures. Birthweight, gestational age, birth defects, preeclampsia, gestational diabetes mellitus, and mode of delivery. Results. We included 17 articles in English, comparing pregnancies in women with prior bariatric surgery to pregnancies in a control group without this. There was considerable heterogeneity in study design and six of the studies included