Evidence map›Paper›PMID 34934402›Full record

ReviewReproductive medicine and biology2022

Effect of hypothyroidism and thyroid autoimmunity on the ovarian reserve: A systematic review and meta-analysis.

Yuko Hasegawa, Yoshikazu Kitahara, Satoko Osuka, Yumiko Tsukui, Mio Kobayashi, Akira Iwase

Open access · goldAbstract readReview
In one paragraph

Review in Reproductive medicine and biology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed, 1 pooled it
4.1field-weighted citation impact, top 5% 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

27 citing papers in PubMed, 1 synthesis or guideline pooled it, 35 citations in OpenAlex.

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  20. The Thyroid Hormone Axis and Female Reproduction.International journal of molecular sciences · 2023
    Review
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

6 authors at 2 institutions in 1 country.

Yuko HasegawaDepartment of Obstetrics and Gynecology Gunma University Graduate School of Medicine Maebashi Japan.
Yoshikazu KitaharaDepartment of Obstetrics and Gynecology Gunma University Graduate School of Medicine Maebashi Japan.
Satoko OsukaDepartment of Obstetrics and Gynecology Nagoya University Graduate School of Medicine Nagoya Japan.ORCID https://orcid.org/0000-0002-4430-7982
Yumiko TsukuiDepartment of Obstetrics and Gynecology Gunma University Graduate School of Medicine Maebashi Japan.
Mio KobayashiDepartment of Obstetrics and Gynecology Gunma University Graduate School of Medicine Maebashi Japan.
Akira IwaseDepartment of Obstetrics and Gynecology Gunma University Graduate School of Medicine Maebashi Japan.ORCID https://orcid.org/0000-0002-0031-884X
Gunma University · JPNagoya University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundEvidence suggests that hypothyroidism and thyroid autoimmunity (TAI) are possibly associated with ovarian dysfunction. This meta-analysis aimed to investigate whether hypothyroidism and/or TAI affect the ovarian reserve and evaluated using the anti-Mullerian hormone (AMH).

methodsPubMed, EMBASE, Web of Science, and Cochrane Controlled Trials Register databases from inception to October 2020 were searched to identify relevant studies. Studies comparing the AMH levels between the control and the affected groups were included in the data synthesis. The primary endpoint in the meta-analysis was AMH levels compared with the controls. MAIN

findingsNine trials were included in the analysis. The AMH levels were significantly lower in the adults with euthyroid TAI (mean difference -0.12, [95% CI: -0.18 to -0.06]). The AMH levels tended to be lower in subclinical hypothyroidism and overt hypothyroidism than in the control group, although the differences were not significant. The AMH levels were significantly higher in the euthyroid TAI group in the adolescents (mean difference 2.51, [95% CI 1.82 to 3.21]).

conclusionTAI and hypothyroidism may affect the ovarian reserve. The opposite effects on AMH levels depending on age suggest that TAI may be implicated in the depletion of follicles in adults following extensive activation of primordial follicles in adolescence.

Indexed as

adolescentAMHhypothyroidismovarian reservethyroid autoimmunity

Identifiers

PMID34934402
PMCPMC8656199
OpenAlexW4200442773

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.