Evidence map›Paper›PMID 34797929›Full record

ArticleBJOG : an international journal of obstetrics and gynaecology2022

Caesarean birth in women with infertility: population-based cohort study.

E Richmond, J G Ray, J Pudwell, M Djerboua, L Gaudet, M Walker, G N Smith, M P Velez

Open access · hybridAbstract read
In one paragraph

Article in BJOG : an international journal of obstetrics and gynaecology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
5.7field-weighted citation impact, top 4% 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

15 citing papers in PubMed, 25 citations in OpenAlex.

  1. Article
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  3. Hysterectomy for placenta accreta spectrum disorder: Impact of institutional surgical volume on patient outcomes.International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics · 2026
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  15. Caesarean birth in women with infertility: population-based cohort study.BJOG : an international journal of obstetrics and gynaecology · 2022
    Article
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

8 authors at 3 institutions in 1 country.

E RichmondDepartment of Obstetrics & Gynaecology, Kingston General Hospital, Queen's University, Kingston, ON, Canada.
J G RayICES, Toronto, ON, Canada.
J PudwellDepartment of Obstetrics & Gynaecology, Kingston General Hospital, Queen's University, Kingston, ON, Canada.
M DjerbouaICES, Toronto, ON, Canada.
L GaudetDepartment of Obstetrics & Gynaecology, Kingston General Hospital, Queen's University, Kingston, ON, Canada.
M WalkerDepartment of Obstetrics, Gynaecology & Newborn Care, University of Ottawa, Ottawa, ON, Canada.
G N SmithDepartment of Obstetrics & Gynaecology, Kingston General Hospital, Queen's University, Kingston, ON, Canada.
M P VelezDepartment of Obstetrics & Gynaecology, Kingston General Hospital, Queen's University, Kingston, ON, Canada.ORCID https://orcid.org/0000-0003-4834-8279
Queen's University · CASt. Michael's Hospital · CAUniversity of Ottawa · CA

Funding

Canadian Institutes of Health Research (CIHR) Institute of Human Development, Child & Youth Health (IHDCYH) MFM - 146444
6 · The paper itself

Abstract

objectiveCaesarean section (CS) is more common following infertility treatment (IT) but the reasons why remain unclear and confounded. The Robson 10-Group Classification System (TGCS) may further explain variation in CS rates. We assessed the association between mode of conception and CS across Robson groups.

designPopulation-based cohort study.

settingOntario, Canada, in a public healthcare system. POPULATION: 921 023 births, 2006-2014.

methodsModified Poisson regression produced relative risks (RR) and 95% confidence intervals, comparing the risk of CS among women with (1) subfertility without IT, (2) non-invasive IT (OI, IUI) or (3) invasive IT (IVF)-each relative to (4) spontaneous conception (SC).

main outcome measuresCS rate according to one of four modes of conception, overall and stratified by each of the TGCS groups.

resultsRelative to SC (26.9%), the risk of CS increased in those with subfertility without IT (RR 1.17, 95% CI 1.16-1.18), non-invasive IT (RR 1.21, 95% CI 1.18-1.24) and invasive IT (RR 1.39, 95% CI 1.36-1.42). Within each Robson group, similar patterns of RRs were seen, but with markedly differing rates. For example, in Group 1 (nulliparous, singleton, cephalic at ≥37 weeks, with spontaneous labour), the respective rates were 15.0, 19.4, 18.7 and 21.9%; in Group 2 (nulliparous, singleton, cephalic at ≥37 weeks, without spontaneous labour), the rates were 35.9, 44.4, 43.2 and 54.1%; and in Group 8 (multiple pregnancy), they were 55.9, 67.5, 65.0 and 69.3%, respectively.

conclusionsCS is relatively more common in women with subfertility and those receiving IT, an effect that persists across Robson groups. TWEETABLE ABSTRACT: Caesarean delivery is more common in women with infertility independent of demographics and prenatal conditions.

Indexed as

Cesarean SectionInfertilityCohort StudiesFemaleHumansOntarioParturitionPregnancyCaesarean sectioninfertilityRobson classification

Identifiers

PMID34797929
PMCPMC9300122
OpenAlexW3213042329

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.