Obes Surg. 2025 Sep 8. doi: 10.1007/s11695-025-08228-2. Online ahead of print.
ABSTRACT
BACKGROUND: Metabolic bariatric surgery (MBS) is the most effective obesity treatment. The increasing number of MBS among young patients has led to more post-bariatric pregnancies. Our study investigates how breastfeeding duration impacts postpartum weight retention and health outcomes for mothers and babies after MBS.
METHODS: MOMBARIS (Maternal Outcomes of Bariatric Surgery and Pregnancy Study) is a multicentre study. The population is derived from MOMBARIS 2, which focused on obstetric outcomes. It included patients who became pregnant following MBS, analysing pre-operative metrics, type of surgery, pregnancy details, and breastfeeding duration. Data analysis was conducted using Julius.ai.
RESULTS: We analysed 156 patients post-MBS, with 148 pregnancies leading to childbirth. Among them, 131 had laparoscopic sleeve gastrectomy (LSG), 12 underwent Roux-en-Y gastric bypass (RYGB), and 5 had one anastomosis gastric bypass (OAGB). The mean age was 31.7 ± 5.45 years (range 19-48) with a pre-operative BMI of 43.9 kg/m2 ± 5.8 kg/m2 (range 31.9-68.8). The mean %EWL was 72% (± 28.6). Seventeen patients had multiple children. Breastfeeding results indicated that 116 patients (78.4%) initiated breastfeeding, with 40.5% continuing beyond 6 months. No significant differences were found in BMI metrics across breastfeeding groups.
CONCLUSIONS: Bariatric outcomes (%EWL, %TWL) show no statistical difference based on breastfeeding patterns, nor does breastfeeding significantly affect weight loss maintenance post-surgery. Additionally, delaying pregnancy after surgery does not guarantee more significant weight loss.
PMID:40921955 | DOI:10.1007/s11695-025-08228-2