Abstract
Objective: Identify the frequency of vitamin A deficiency in pregnant women post Roux-en-Y gastric bypass (RYGP) and to assess the effects on fetuses. Methods: Integrative literature review based on articles publishes in PubMed/MEDLINE, Scientific Eletronic Library Online (Scielo), Web of Science e SCOPUS (Elsevier), as electronic data bases. The descriptors used were ‘vitamin A’, ‘vitamin A deficiency’, ‘pregnancy’, and ‘Roux-en-Y gastric bypass’. Only Portuguese and English language full-text article, indexed in the aforementioned data bases, published between 2016 and 2021 were included within this study. Results: Twelve articles were selected. As results, it was reported an increase in vitamin A deficiency after RYGP, and when associated with pregnancy post-surgery, may aggravate the deficiency. In fetuses and newborn, of post-surgery mothers, identified vitamin A deficiency in the umbilical cord, congenital malformation, alteration in the intestinal microbiota and consequences on immune system. Final Considerations: Pregnancy post RYGB increases the occurrence of vitamin A deficiency. Nutritional follow-up is necessary for maternal and fetal health previous and post-surgery, and during pregnancy.