Pregnancy after 24 Postoperative Months of Roux-En-Y Gastric Bypass Presents Risk of Pregnancy Complications Similar to Pregnancy within the First Postoperative Year.

Background: To assess the influence of the time interval between pregnancy and the Roux-en-Y gastric bypass (RYGB) on maternal-infant complications.

Methods: This is an analytical, longitudinal and retrospective study comprising 42 pregnant women who had previously undergone RYGB, subdivided according to the time interval between pregnancy and bariatric surgery: ≤12 months (G1), >12 and <24 months (G2) and ≥24 months (G3). Anthropometric variables of mothers, newborns and information on pregnancy complications were collected.

Results: G1 was the group more likely to develop urinary tract infection, dumping syndrome and inadequacy of birth weight than G2. Pregnancy complications were similar and >80.0% both in the first 12 months and after 24 months of the RYGB and the smallest percentages occurred in the time interval of 12-24 months after it. In addition, the percentage of neonatal complications was the highest in G1 when compared to the other times studied.

Conclusion: Our findings indicate less predisposition to maternal-infant complications in pregnancies occurring in the time interval of >12 and <24 months and suggest that pregnancy after 24 months can be as harmful as pregnancies occurring before the first 12 postoperative months, since a great catabolism occurs at this time as it has been shown in the literature.