Pregnancy After Bariatric Surgery: Hepatobiliary Implications, Maternal Outcomes, and Clinical Considerations

The global rise in bariatric surgery among women of reproductive age has led to an increasing number of pregnancies occurring after significant metabolic and anatomical changes. While bariatric surgery improves fertility and metabolic health, its long-term impact on hepatobiliary physiology during pregnancy remains incompletely understood. This narrative review explores the hepatobiliary implications of pregnancy following bariatric surgery, summarizes maternal and fetal outcomes, and highlights clinical considerations for multidisciplinary management. A comprehensive search of PubMed, Scopus, and Web of Science databases was conducted for studies published between 2000 and 2025, using the terms "bariatric surgery," "pregnancy," "liver function," "gallstones," "cholestasis," and "maternal outcomes." Relevant clinical studies, reviews, and case reports were analyzed and synthesized narratively. Animal studies, non-English-language articles, and studies without pregnancy or hepatobiliary outcomes were excluded from analysis. Pregnancy after bariatric surgery is associated with improved metabolic and obstetric profiles compared with pregnancies in untreated obesity. However, rapid weight loss and altered bile acid metabolism predispose patients to hepatobiliary complications, including gallstone formation, biliary colic, and nutritional liver dysfunction. Liver function test abnormalities are frequent but often transient. Early conception (<12 months post-surgery) increases the risk of micronutrient deficiencies and hepatocellular stress. Close monitoring, nutritional optimization, and coordinated care among obstetricians, surgeons, and hepatologists are essential. Pregnancy following bariatric surgery presents unique hepatobiliary challenges requiring individualized, multidisciplinary management. Further research is needed to elucidate the pathophysiologic mechanisms linking altered bile acid metabolism and hepatic adaptation in this population.