Evidence map›Paper›PMID 29700821›Full record

SynthesisActa obstetricia et gynecologica Scandinavica2018

Efficacy of low-molecular-weight heparin on the outcomes of in vitro fertilization/intracytoplasmic sperm injection pregnancy in non-thrombophilic women: a meta-analysis.

Xiu-Li Yang, Fei Chen, Xiu-Ying Yang, Guan-Hua Du, Yang Xu

Open access · hybridAbstract readMeta-AnalysisReview
In one paragraph

Synthesis in Acta obstetricia et gynecologica Scandinavica, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed, 2 pooled it
1.8field-weighted citation impact, top 15% 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

10 citing papers in PubMed, 2 syntheses or guidelines pooled it, 25 citations in OpenAlex.

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  6. [Anti-endothelial cell antibodies in predicting early miscarriage].Beijing da xue xue bao. Yi xue ban = Journal of Peking University. Health sciences · 2023
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

5 authors at 2 institutions in 1 country.

Xiu-Li YangDepartment of Obstetrics and Gynecology, Peking University First Hospital, Beijing, China.
Fei ChenDepartment of Obstetrics and Gynecology, Peking University First Hospital, Beijing, China.
Xiu-Ying YangState Key Laboratory of Bioactive Substance and Function of Natural Medicines and Beijing Key Laboratory of Drug Target and Screening Research, Institute of Materia Medica of Peking Union Medical College, Beijing, China.ORCID http://orcid.org/0000-0001-8500-3128
Guan-Hua DuState Key Laboratory of Bioactive Substance and Function of Natural Medicines and Beijing Key Laboratory of Drug Target and Screening Research, Institute of Materia Medica of Peking Union Medical College, Beijing, China.
Yang XuDepartment of Obstetrics and Gynecology, Peking University First Hospital, Beijing, China.
Chinese Academy of Medical Sciences & Peking Union Medical College · CNPeking University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionThe aim of our study was to evaluate the effect of low-molecular-weight heparin on pregnancy outcomes in women without thrombophilia during in vitro fertilization/intracytoplasmic sperm injection treatment. MATERIAL AND

methodsWe searched Pubmed, Web of Science, Embase, Cochrane and CNKI (from inception to 2 February 2018). Our study identified randomized controlled trials or quasi-randomized controlled trials comparing low-molecular-weight heparin subcutaneous treatment with no treatment or only luteal support control. The outcomes included live birth rate, clinical pregnancy rate and miscarriage rate.

resultsFive trials, including 935 women receiving in vitro fertilization/intracytoplasmic sperm injection treatment, were included in meta-analyses. There were 458 women receiving low-molecular-weight heparin and 477 in the control group. No significant differences for live birth rate, clinical pregnancy rate and miscarriage rate were found between the low-molecular-weight heparin and control groups. Of them, four trials reported live birth rate as an outcome and the risk ratio was 1.13 (95% confidence interval 0.88-1.43, p = 0.34). All five trials reported clinical pregnancy rate as an outcome, the risk ratio was 1.08 (95% confidence interval 0.87-1.32, p = 0.47). Three trials reported miscarriage rate and the risk ratio was 0.58 (95% confidence interval 0.30-1.10, p = 0.09). In women with two or more failed in vitro fertilization/intracytoplasmic sperm injection cycles, the risk ratio of live birth rate was 1.15 and the risk ratio of clinical pregnancy rate was 1.17. In women with three or more failed in vitro fertilization/intracytoplasmic sperm injection cycles, the risk ratios of live birth rate and clinical pregnancy rate were 1.36 and 1.35, respectively.

conclusionsOur results suggested that low-molecular-weight heparin had no effect on pregnancy success rate in non-thrombophilic women undergoing in vitro fertilization/intracytoplasmic sperm injection treatment. However, to justify the use of low-molecular-weight heparin in clinical practice, multicenter trials are still necessary.

Indexed as

Fertilization in VitroPregnancy OutcomeAbortion, SpontaneousFemaleHeparin, Low-Molecular-WeightHumansPregnancyPregnancy RateSperm Injections, IntracytoplasmicThrombophiliaHeparin, Low-Molecular-Weightin vitro fertilization/intracytoplasmic sperm injectionLow-molecular-weight heparinnon-thrombophiliapregnancy outcomesrandomized controlled trial

Identifiers

PMID29700821
PMCPMC6100106
OpenAlexW2800932985

What OpenQuestion holds

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Registered trials

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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.