Evidence map›Paper›PMID 34182957›Full record

SynthesisBMC pregnancy and childbirth2021

Assisted reproductive technology and hypertensive disorders of pregnancy: systematic review and meta-analyses.

Hui Ju Chih, Flavia T S Elias, Laura Gaudet, Maria P Velez

Registry-linked trialOpen access · goldAbstract readMeta-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. It is linked to trial NCT06836843 (Evaluation of Maternal and Neonatal Outcomes Among Lebanese Women Conceived Through Assisted Reproductive Technology), which is not on this map. Cited by 81 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
81citing papers in PubMed, 4 pooled it
31.4field-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.

NCT06836843 active not recruitingnot on this mapstarted 2023, after this paper: background citation

Evaluation of Maternal and Neonatal Outcomes Among Lebanese Women Conceived Through Assisted Reproductive Technology

TypeobservationalSponsorLebanese UniversityRan2023 to 2025Enrolled1,000ConditionsPreterm Birth, Gestational Diabetes Mellitus (GDM), Gestational HypertensionArmsSince this is an observational study rather than an interventional study, the exposure type refers to all potential factors influencing pregnancy both before and during pregnancy
3 · Its place in the literature

Who cites it

81 citing papers in PubMed, 4 syntheses or guidelines pooled it, 131 citations in OpenAlex.

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21 more citing papers are in PubMed but not listed here.

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

4 authors at 1 institution in 2 countries.

Hui Ju ChihDepartment 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.
Laura GaudetDepartment 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 https://orcid.org/0000-0003-4834-8279
Queen's University · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundHypertensive disorders of pregnancy (HDP) is one of the most common pregnancy complications and causes of maternal morbidity and mortality. Assisted reproductive technology (ART) has been associated with adverse pregnancy outcomes, including HDP. However, the impact of multiple pregnancies, oocyte donation, as well as fresh and frozen embryo transfer needs to be further studied. We conducted a systematic review and meta-analyses to evaluate the association between ART and HDP or preeclampsia relative to spontaneous conception (SC).

methodsWe identified studies from EMBASE, MEDLINE, and Cochrane Library (up to April 8, 2020) and manually using structured search strategies. Cohort studies that included pregnancies after in vitro fertilization (IVF) with or without intracytoplasmic sperm fertilization (ICSI) relative to SC with HDP or preeclampsia as the outcome of interest were included. The control group was women who conceived spontaneously without ART or fertility medications. The pooled results were reported in odds ratios (OR) with 95% confidence intervals based on random effects models. Numbers needed to harm (NNH) were calculated based on absolute risk differences between exposure and control groups.

resultsEighty-five studies were included after a screening of 1879 abstracts and 283 full text articles. Compared to SC, IVF/ICSI singleton pregnancies (OR 1.70; 95% CI 1.60-1.80; I

conclusionsOur meta-analysis confirmed that IVF/ICSI pregnancies are at higher odds of HDP and preeclampsia than SC, irrespective of the plurality. The odds were especially high in frozen embryo transfer and oocyte donation pregnancies.

Indexed as

Pregnancy, MultipleEmbryo TransferFemaleFertilization in VitroHumansHypertension, Pregnancy-InducedOdds RatioOocyte DonationPre-EclampsiaPregnancyPregnancy OutcomeReproductive Techniques, AssistedSperm Injections, IntracytoplasmicAssisted reproductive technologyFresh embryo transferFrozen embryo transferHypertensive disorders of pregnancyIntracytoplasmic sperm injectionIn vitro fertilizationMeta-analysisOocyte donationPreeclampsia

Identifiers

PMID34182957
PMCPMC8240295
OpenAlexW3158846710

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

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.