Evidence map›Paper›PMID 30013428›Full record

ArticleReproductive medicine and biology2018

Meiotic spindle size is a strong indicator of human oocyte quality.

Hiroyuki Tomari, Ko Honjo, Katsuko Kunitake, Natsumi Aramaki, Saori Kuhara, Naomi Hidaka, Kayoko Nishimura, Yumi Nagata, Toshitaka Horiuchi

Abstract read
In one paragraph

Article in Reproductive medicine and biology, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.

0numbers the graph read from it
0cells of the map it votes in
26citing 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

26 citing papers in PubMed.

  1. Review
  2. Article
  3. Review
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Spindle observation aids decision-making for early rescue ICSI.Journal of assisted reproduction and genetics · 2025
    Article
  10. Is Emerging Nanomedicine a Friend or Foe to Germ Cells?International journal of nanomedicine · 2025
    Review
  11. Article
  12. Review
  13. Article
  14. Article
  15. Article
  16. Timing of ICSI with Respect to Meiotic Spindle Status.International journal of molecular sciences · 2022
    Article
  17. Article
  18. Review
  19. Article
  20. 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

9 authors.

Hiroyuki TomariIVF Nagata Clinic Fukuoka Japan.ORCID 0000-0001-8085-4214
Ko HonjoIVF Nagata Clinic Fukuoka Japan.
Katsuko KunitakeIVF Nagata Clinic Fukuoka Japan.
Natsumi AramakiIVF Nagata Clinic Fukuoka Japan.
Saori KuharaIVF Nagata Clinic Fukuoka Japan.
Naomi HidakaIVF Nagata Clinic Fukuoka Japan.
Kayoko NishimuraIVF Nagata Clinic Fukuoka Japan.
Yumi NagataIVF Nagata Clinic Fukuoka Japan.
Toshitaka HoriuchiGraduate School of Comprehensive Scientific Research Prefectural University of Hiroshima Hiroshima Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo investigate the relationship between the meiotic spindle size in human metaphase II oocytes and embryo developmental potential after intracytoplasmic sperm injection (ICSI).

methodsAnalyzed were 1302 oocytes with a visible meiotic spindle from 281 patients aged under 40 years undergoing ICSI cycles. The meiotic spindle was imaged by using PolScope before ICSI. The oocytes were classified into three groups, according to spindle size: group A (<90 μm

resultsOverall, 389 (29.9%) oocytes were classified into group A, 662 (50.8%) into group B, and 251 (19.3%) into group C. The fertilization rate of the group B oocytes was significantly higher than for the A and C oocytes. The blastocyst formation rate in group B was significantly higher than in group A. In addition, the pregnancy rate in group B was significantly higher than in the other two groups.

conclusionThe oocytes with a spindle size of 90-120 μm

Indexed as

assisted reproductive technologyblastocystfertilizationintracytoplasmic sperm injectionmeiotic spindle

Identifiers

PMID30013428
PMCPMC6046518

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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.