Evidence map›Paper›PMID 35255655›Full record

ArticleClinical and experimental reproductive medicine2022

Lifetime changes of the oocyte pool: Contributing factors with a focus on ovulatory inflammation.

Chan Jin Park, Ji-Eun Oh, Jianan Feng, Yoon Min Cho, Huanyu Qiao, CheMyong Ko

Abstract read
In one paragraph

Article in Clinical and experimental reproductive medicine, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
–field-weighted citation impact
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

13 citing papers in PubMed.

  1. Article
  2. Inflammatory and Redox Mediators in Rat and Human Ovulation.International journal of molecular sciences · 2025
    Review
  3. Article
  4. Article
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  7. Article
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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.

Chan Jin ParkDepartment of Comparative Biosciences, College of Veterinary Medicine, University of Illinois Urbana-Champaign, Urbana, IL ,USA.
Ji-Eun OhDepartment of Comparative Biosciences, College of Veterinary Medicine, University of Illinois Urbana-Champaign, Urbana, IL ,USA.
Jianan FengDepartment of Comparative Biosciences, College of Veterinary Medicine, University of Illinois Urbana-Champaign, Urbana, IL ,USA.
Yoon Min ChoDepartment of Comparative Biosciences, College of Veterinary Medicine, University of Illinois Urbana-Champaign, Urbana, IL ,USA.
Huanyu QiaoDepartment of Comparative Biosciences, College of Veterinary Medicine, University of Illinois Urbana-Champaign, Urbana, IL ,USA.
CheMyong KoDepartment of Comparative Biosciences, College of Veterinary Medicine, University of Illinois Urbana-Champaign, Urbana, IL ,USA.

Funding

Micromechanical basis of meiotic chromosome condensation and architectureR01GM135549 · NIGMS · UNIVERSITY OF ILLINOIS AT URBANA-CHAMPAIGN · PI QIAO, HUANYU · 2020 to 2024
$2.2M
Meiotic checkpoint pathways and gametocyte quality controlR00HD082375 · NICHD · UNIVERSITY OF ILLINOIS AT URBANA-CHAMPAIGN · PI QIAO, HUANYU · 2017 to 2019
$674k
NICHD NIH HHS R00 HD082375NIGMS NIH HHS R01 GM135549
6 · The paper itself

Abstract

In mammalian species, females are born with a number of oocytes exceeding what they release via ovulation. In humans, an average girl is born with over a thousand times more oocytes than she will ovulate in her lifetime. The reason for having such an excessive number of oocytes in a neonatal female ovary is currently unknown. However, it is well established that the oocyte number decreases throughout the entire lifetime until the ovary loses them all. In this review, data published in the past 80 years were used to assess the current knowledge regarding the changing number of oocytes in humans and mice, as well as the reported factors that contribute to the decline of oocyte numbers. Briefly, a collective estimation indicates that an average girl is born with approximately 600,000 oocytes, which is 2,000 times more than the number of oocytes that she will ovulate in her lifetime. The oocyte number begins to decrease immediately after birth and is reduced to half of the initial number by puberty and almost zero by age 50 years. Multiple factors that are either intrinsic or extrinsic to the ovary contribute to the decline of the oocyte number. The inflammation caused by the ovulatory luteinizing hormone surge is discussed as a potential contributing factor to the decline of the oocyte pool during the reproductive lifespan.

Indexed as

Atretic follicleFolliculogenesisGerm cellsInflammationOocytesReproductive health

Identifiers

PMID35255655
PMCPMC8923630

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.