Evidence map›Paper›PMID 37532995›Full record

SynthesisBMC pregnancy and childbirth2023

Adverse perinatal outcomes after Roux-en-Y Gastric Bypass vs. Sleeve Gastrectomy: a systematic review.

Astrid Kistner, Alva Werner, Mehreen Zaigham

Open access · goldAbstract readSystematic Review
In one paragraph

Synthesis in BMC pregnancy and childbirth, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed
1.3field-weighted citation impact, top 20% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

4 citing papers in PubMed, 4 citations in OpenAlex.

  1. Pregnancy after bariatric surgery: persistent obesity and longer time to conception influences peripartum outcomes more than the type of operation.Surgery for obesity and related diseases : official journal of the American Society for Bariatric Surgery · 2026
    Article
  2. Article
  3. Comparison of pregnancy outcomes after bariatric surgery by sleeve gastrectomy versus gastric bypass.European journal of obstetrics & gynecology and reproductive biology: X · 2024
    Article
  4. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

3 authors at 1 institution in 2 countries.

Astrid KistnerDepartment of Obstetrics & Gynecology, Lund University and Skåne University Hospital, Malmö, 205 01, Sweden.
Alva WernerDepartment of Obstetrics & Gynecology, Lund University and Skåne University Hospital, Malmö, 205 01, Sweden.
Mehreen ZaighamDepartment of Obstetrics & Gynecology, Lund University and Skåne University Hospital, Malmö, 205 01, Sweden. mehreen.zaigham@med.lu.se.
Lund University · SE

Funding

Swedish ALF-agreement YF00054MZ
6 · The paper itself

Abstract

backgroundPregnancies occurring after bariatric surgery are associated with various perinatal complications. However, there may be differences in the type of perinatal complications occurring after different methods of bariatric surgery. The aim of the current study was to compare adverse perinatal outcomes in pregnant women following Roux-en-Y Gastric Bypass (RYGB) vs. Sleeve Gastrectomy (SG).

methodsA systematic database search was performed in PubMed, Embase, Scopus and CINAHL. Observational studies comparing perinatal outcomes post-bariatric (RYGB and SG) surgery to pregnancies without prior surgery were selected. Outcomes of interest were: maternal body mass index (BMI) at the time of conception, mode of delivery, time from surgery to conception, birth weight, gestational age and intrauterine fetal death. Article selection, risk of bias assessment and data extraction, were performed by two authors. The study protocol was published in its revised form in PROSPERO, registration number: CRD42021234480.

resultsA total of 3201 records were extracted. After duplicates were removed, 3143 records were screened for inclusion. Six studies fitted the selection criteria, of which four studies were RYGB and two SG (1100 post-RYGB vs. 209 post-SG). For the included studies, higher incidence of both SGA (22.9%, 11.9%, 14.2%) and LGA (4.2%, 4.8%, 1.7%) in SG compared to Roux-en-Y (SGA: 8.8%, 7.7%, 11.5%, 8.3% and LGA: 3.4%, 0.7%) were observed. SG had a shorter surgery to conception interval as compared to RYGB. Risk of bias assessment was moderate to serious for the studies included in the review, with bias in selection of participants being the major reason.

conclusionOur systematic review demonstrated no major differences in BMI, mode of delivery, birthweight, gestational age, or rates of intrauterine death between women having undergone RYGB vs. SG. The rate of SGA and LGA births were higher in the SG group, but this group also had a shorter surgery to conception interval. Future studies are indicated to counsel women of reproductive age on the most appropriate type of bariatric surgery that is associated with the best perinatal outcomes.

Indexed as

Bariatric SurgeryGastrectomyGastric BypassObesity, MorbidFemaleHumansParturitionPregnancyRetrospective StudiesTreatment OutcomeBariatric surgeryGestational ageIntrauterine death.Large for gestational ageMode of birthPerinatal outcomesRoux-en-Y gastric bypassSleeve gastrectomySmall for gestational age

Identifiers

PMID37532995
PMCPMC10394842
OpenAlexW4385494812

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.