Obesity Surgery

, Volume 28, Issue 11, pp 3559–3566 | Cite as

Influence of Time Interval from Bariatric Surgery to Conception on Pregnancy and Perinatal Outcomes

  • Cátia Rasteiro
  • Célia Araújo
  • Sara Cunha
  • Rita Caldas
  • Joana Mesquita
  • Adérito Seixas
  • Nuno Augusto
  • Carla Ramalho
Original Contributions



Pregnancy in women submitted to bariatric surgery is increasing. Recommendations for surveillance of these pregnancies have been suggested, but an adequate time interval from surgery to conception, to avoid perinatal negative outcomes, is still controversial.

Material and Methods

Medical records of pregnancies in women with previous bariatric surgery were retrieved and outcomes were assessed according to three different time thresholds (12, 18 and 24 months). The association between time from surgery to conception and the presence of adverse outcomes was analysed.


Eighty-six pregnancies were assessed. Weight gain was higher (p = 0.014) and more adequate (p = 0.041) when pregnancy occurred more than 12 months after surgery. Foetal growth percentile was lower when pregnancy was achieved before 24 months following surgery (p = 0.021). No differences among groups were found in other assessed outcomes (BMI, gestational age at delivery, type of delivery, gestational diabetes, pregnancy hypertensive disease, anaemia, preterm delivery, foetal weight, foetal growth restriction, Apgar score, admission to neonatal intensive unit) in all considered thresholds. No association between time from surgery to conception and the presence of adverse outcomes was found.


Despite differences found in maternal weight gain and foetal growth percentile, our study does not support the recommendation to delay pregnancy based on a fixed deadline. Other factors, including a more individualised approach, need to be considered.


Obesity Pregnancy Bariatric surgery Surgery to conception time interval 



Cátia Rasteiro, as principal investigator, had full access to all the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.


This research did not receive any specific grant from funding agencies in the public, commercial or not-for-profit sectors.

Compliance with Ethical Standards

Conflict of Interest

The authors declare that they have no conflicts of interest.

Statement of Human and Animal Rights

Not Applicable.

Statement of Informed Consent

For this type of study, formal consent is not required.


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Centro Hospitalar de Entre o Douro e VougaSanta Maria da FeiraPortugal
  2. 2.Faculdade de Ciências da SaúdeUniversidade da Beira InteriorCovilhãPortugal
  3. 3.Escola Superior de SaúdeUniversidade Fernando PessoaPortoPortugal
  4. 4.LABIOMEP, INEGI-LAETA, Faculty of SportsUniversity of PortoPortoPortugal
  5. 5.Faculdade de Ciências Sociais e HumanasUniversidade da Beira InteriorCovilhãPortugal
  6. 6.Centre for Research and Studies in SociologyUniversity Institute of LisbonLisbonPortugal
  7. 7.Centro Hospitalar São JoãoEPEPortoPortugal
  8. 8.Faculdade de Medicina da Universidade do PortoPortoPortugal
  9. 9.Universidade do PortoInstituto de Investigação e Inovação em SaúdePortoPortugal

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