Evidence map›Paper›PMID 33752633›Full record

SynthesisBMC pregnancy and childbirth2021

Caesarean section in pregnancies conceived by assisted reproductive technology: a systematic review and meta-analysis.

Nakeisha A Lodge-Tulloch, Flavia T S Elias, Jessica Pudwell, Laura Gaudet, Mark Walker, Graeme N Smith, Maria P Velez

Open access · goldAbstract readComparative StudyMeta-AnalysisSystematic Review
In one paragraph

Synthesis in BMC pregnancy and childbirth, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
10.7field-weighted citation impact, top 1% 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

23 citing papers in PubMed, 44 citations in OpenAlex.

  1. Article
  2. [Analysis of Maternal Pregnancy Characteristics and Adverse Neonatal Birth Outcomes at a Single Center From 2017 to 2022].Sichuan da xue xue bao. Yi xue ban = Journal of Sichuan University. Medical science edition · 2026
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  14. Women's health reports (New Rochelle, N.Y.) · 2024
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 2 institutions in 2 countries.

Nakeisha A Lodge-TullochDepartment of Obstetrics and Gynecology, Kingston General Hospital, Queen's University, Victory 4, 76 Stuart St, Kingston, Ontario, K7L 2V7, Canada.
Flavia T S EliasDepartment of Obstetrics and Gynecology, Kingston General Hospital, Queen's University, Victory 4, 76 Stuart St, Kingston, Ontario, K7L 2V7, Canada.
Jessica PudwellDepartment of Obstetrics and Gynecology, Kingston General Hospital, Queen's University, Victory 4, 76 Stuart St, Kingston, Ontario, K7L 2V7, Canada.
Laura GaudetDepartment of Obstetrics and Gynecology, Kingston General Hospital, Queen's University, Victory 4, 76 Stuart St, Kingston, Ontario, K7L 2V7, Canada.
Mark WalkerDepartment of Obstetrics, Gynecology & Newborn Care, University of Ottawa, 451 Smyth Road, Ottawa, Ontario, K1H 8M5, Canada.
Graeme N SmithDepartment of Obstetrics and Gynecology, Kingston General Hospital, Queen's University, Victory 4, 76 Stuart St, Kingston, Ontario, K7L 2V7, Canada.
Maria P VelezDepartment of Obstetrics and Gynecology, Kingston General Hospital, Queen's University, Victory 4, 76 Stuart St, Kingston, Ontario, K7L 2V7, Canada. maria.velez@queensu.ca.ORCID http://orcid.org/0000-0003-4834-8279
Queen's University · CAUniversity of Ottawa · CA

Funding

CIHR IHDCYH Clinician Investigators Program MFM-146444
6 · The paper itself

Abstract

backgroundCaesarean section rates are higher among pregnancies conceived by assisted reproductive technology (ART) compared to spontaneous conceptions (SC), implying an increase in neonatal and maternal morbidity. We aimed to compare caesarean section rates in ART pregnancies versus SC, overall, by indication (elective versus emergent), and by type of ART treatment (in-vitro fertilization (IVF), intracytoplasmic sperm injection (ICSI), fresh embryo transfer, frozen embryo transfer) in a systematic review and meta-analysis.

methodsWe searched Medline, EMBASE and CINAHL databases using the OVID Platform from 1993 to 2019, and the search was completed in January 2020. The eligibility criteria were cohort studies with singleton conceptions after in-vitro fertilization and/or intracytoplasmic sperm injection using autologous oocytes versus spontaneous conceptions. The study quality was assessed using the Newcastle Ottawa Scale and GRADE approach. Meta-analyses were performed using odds ratios (OR) with a 95% confidence interval (CI) using random effect models in RevMan 5.3, and I-squared (I

resultsOne thousand seven hundred fifty studies were identified from the search of which 34 met the inclusion criteria. Compared to spontaneous conceptions, IVF/ICSI pregnancies were associated with a 1.90-fold increase of odds of caesarean section (95% CI 1.76, 2.06). When stratified by indication, IVF/ICSI pregnancies were associated with a 1.91-fold increase of odds of elective caesarean section (95% CI 1.37, 2.67) and 1.38-fold increase of odds of emergent caesarean section (95% CI 1.09, 1.75). The heterogeneity of the studies was high and the GRADE assessment moderate to low, which can be explained by the observational design of the included studies.

conclusionsThe odds of delivering by caesarean section are greater for ART singleton pregnancies compared to spontaneous conceptions. Preconception and pregnancy care plans should focus on minimizing the risks that may lead to emergency caesarean sections and finding strategies to understand and decrease the rate of elective caesarean sections.

Indexed as

Cesarean SectionElective Surgical ProceduresEmergency TreatmentFemaleHumansInfertilityPregnancyReproductive Techniques, AssistedRisk AssessmentElective caesarean sectionEmergent caesarean sectionFresh embryo transferFrozen embryo transferIntracytoplasmic sperm injection (ICSI)In-vitro fertilization (IVF)Maternal outcomes

Identifiers

PMID33752633
PMCPMC7986269
OpenAlexW3139098840

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.