Obesity Surgery

, Volume 19, Issue 5, pp 583–589 | Cite as

Pregnancy Nutritional Indices and Birth Weight After Roux-en-Y Gastric Bypass

  • Joel FaintuchEmail author
  • Maria Carolina Gonçalves Dias
  • Eliener de Souza Fazio
  • Fernanda Castello Branco Mariz de Oliveira
  • Roseli Mieko Yamamoto Nomura
  • Marcelo Zugaib
  • Ivan Cecconello
Research Article



Maternal metabolic profile and nutritional course of pregnancy after bariatric interventions is incompletely known. Their impact on birth weight has also not been hitherto addressed. Aiming to document such variables, a retrospective study was undertaken.


Women previously submitted to silastic ring Roux-en-Y gastric bypass, who conceived after 0–5 years (n = 14), were investigated. Intake of selected macro- and micronutrients, representative laboratory measurements, and correlation of these findings with birth weight and time to conception was documented.


Mean calorie intake was restricted to about 1,800 kcal/day. Protein (71 ± 17 g/day) and supplementary iron (60 mg/day) were barely adequate, and calcium and vitamin B12 did not meet current recommendations, only folic acid being optimal. Biochemical monitoring reflected these inconsistencies, with occasional low values for serum albumin (4.1 ± 0.4 g/dL), hemoglobin (11.4 ± 1.5 g/dL), iron (78 ± 50 μg/dL) and vitamin B12 (193 ± 102 pg/mL) but not folate. Lipids, glucose, and uric acid were much better than before the anti-obesity intervention. Reduced plasma lipids, glucose, and uric acid were associated with larger birth weight, albeit within the normal range.


(1) Anemia as well as additional nutritional deficits during pregnancy were not totally eliminated, despite dietary guidance and micronutrient supplementation; (2) alleviation of metabolic comorbidities was demonstrated, and improved normalization predicted higher birth weight; (3) energy and folate intake was sufficient, but other nutrients probably did not reach ideal levels; (4) recent dietary guidelines for this population represent a step forward, but additional studies are needed.


Obesity Pregnancy Bariatric surgery Roux-en-Y gastric bypass Neonates Birth weight Anemia Diet Serum lipids Calories Protein Iron Calcium Vitamin B12 Folic acid 


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Copyright information

© Springer Science + Business Media, LLC 2008

Authors and Affiliations

  • Joel Faintuch
    • 1
    Email author
  • Maria Carolina Gonçalves Dias
    • 2
  • Eliener de Souza Fazio
    • 3
  • Fernanda Castello Branco Mariz de Oliveira
    • 3
  • Roseli Mieko Yamamoto Nomura
    • 4
  • Marcelo Zugaib
    • 4
  • Ivan Cecconello
    • 5
  1. 1.Nutrology GroupHospital das ClinicasSao PauloBrazil
  2. 2.Division of Nutrition and Dietetics and Nutrology GroupHospital das ClinicasSao PauloBrazil
  3. 3.Division of Nutrition and DieteticsHospital das ClinicasSao PauloBrazil
  4. 4.Department of Gynecology and ObstetricsHospital das ClinicasSao PauloBrazil
  5. 5.Division of Gastrointestinal SurgeryHospital das ClinicasSao PauloBrazil

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