Evidence map›Paper›PMID 29043757›Full record

SynthesisJBRA assisted reproduction2017

There is no association between the presence of anti-thyroid antibodies and increased reproductive loss in pregnant women after ART: a systematic review and meta-analysis.

Paz Leiva, Juan Enrique Schwarze, Pamela Vasquez, Carolina Ortega, Sonia Villa, Javier Crosby, José Balmaceda, Ricardo Pommer

Open access · bronzeAbstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in JBRA assisted reproduction, 2017. 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 14% 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.

  1. Pooled it
  2. Pooled it
  3. Review
  4. Article
  5. Review
  6. Review
  7. Article
  8. Thyroid disorders in subfertility and early pregnancy.Therapeutic advances in endocrinology and metabolism · 2020
    Review
  9. Article
  10. 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 2 countries.

Paz LeivaObstetrics and Gynecology Department at Universidad de Santiago, Chile.
Juan Enrique SchwarzeObstetrics and Gynecology Department at Universidad de Santiago, Chile.
Pamela VasquezEpidemiology Department, Universidad de los Andes, Chile.
Carolina OrtegaReproductive Medicine Unit at Clinica Monteblanco.
Sonia VillaReproductive Medicine Unit at Clinica Monteblanco.
Javier CrosbyReproductive Medicine Unit at Clinica Las Condes.
José BalmacedaReproductive Medicine Unit at Clinica Monteblanco.
Ricardo PommerReproductive Medicine Unit at Clinica Monteblanco.
Universidad de Santiago de Chile · CLClínica Las Condes · CLUniversidad de Los Andes · BO

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Women submitted to ART treatments represent a select subgroup of individuals. Several studies have described the relationship between TAI and pregnancy outcomes as a result of ART, with contradictory results. The purpose of this systematic review was to determine the association between TAI and the risk of miscarriage in pregnancies resulting from ART. MEDLINE via PubMed, LILACS and Embase were searched for studies published in peer-reviewed journals from 1999 to 2017. The studies were summarized using the fixed effects model and the Peto's method to calculate RR in order to flesh out the association between TAI and spontaneous abortion. Only four papers were included in this systematic review and meta-analysis. Thirty-one miscarriages were observed in 210 clinical pregnancies of women with antithyroid antibodies; and 158 miscarriages were seen in 1,371 pregnancies without antithyroid antibodies. The meta-analysis failed to find an association between TAI and higher risk of reproductive loss, RR=0.94 95% confidence interval: 0.71-1.24; p=0.879. In conclusion, the presence of antithyroid antibodies was not associated with increased reproductive loss in patients submitted to ART treatments. It is our opinion that the presence of antithyroid antibodies should be considered as a secondary biomarker of autoimmune disease, rather than an actual cause of miscarriage in patients undergoing ART. Due to the small amount of evidence on the matter, the determination of TAI before the initiation of ART should be limited to research contexts.

Indexed as

Reproductive Techniques, AssistedAbortion, HabitualAutoimmunityFemaleHumansThyroid GlandanitbodiesARTthyroid

Identifiers

PMID29043757
PMCPMC5714606
OpenAlexW2767931869

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.