Evidence map›Paper›PMID 31956286›Full record

ArticleReproductive medicine and biology2020

Selection of high-quality and viable blastocysts based on timing of morula compaction and blastocyst formation.

Yoshihisa Harada, Tomoyo Maeda, Emi Fukunaga, Reiko Shiba, Shinichiro Okano, Masayuki Kinutani, Toshitaka Horiuchi

Open access · goldAbstract read
In one paragraph

Article in Reproductive medicine and biology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
2.7field-weighted citation impact, top 10% 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

20 citing papers in PubMed, 36 citations in OpenAlex.

  1. Review
  2. Clocks and Dominoes: Timing Mechanisms of Embryogenesis.bioRxiv : the preprint server for biology · 2026
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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

7 authors at 2 institutions in 1 country.

Yoshihisa HaradaKinutani Women's Clinic Hiroshima Japan.ORCID https://orcid.org/0000-0001-8157-3481
Tomoyo MaedaKinutani Women's Clinic Hiroshima Japan.
Emi FukunagaKinutani Women's Clinic Hiroshima Japan.
Reiko ShibaKinutani Women's Clinic Hiroshima Japan.ORCID https://orcid.org/0000-0002-7228-2997
Shinichiro OkanoKinutani Women's Clinic Hiroshima Japan.
Masayuki KinutaniKinutani Women's Clinic Hiroshima Japan.
Toshitaka HoriuchiGraduate School of Comprehensive Scientific Research Prefectural University of Hiroshima Hiroshima Japan.ORCID https://orcid.org/0000-0001-9592-4238
Hiroshima Bunkyo University · JPPrefectural University of Hiroshima · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe time-lapse system is a device that allows continuous monitoring without removing embryos from the incubator. Using a time-lapse system, we retrospectively investigated cleavage speed time points as potential indicators for selecting high-quality viable blastocysts.

methodsThis study included 963 zygotes of two pronuclei retrieved from 196 patients between January 2015 and December 2016. All embryos in culture were monitored by time-lapse after intracytoplasmic sperm injection. Of 492 blastocysts developed in vitro, 128 vitrified-warmed single blastocyst transfers were classified into pregnancy and non-pregnancy groups, and the parameters were compared.

resultsIn the pregnancy group, timing of both morula compaction and regular blastocyst formation was significantly faster than in the non-pregnancy group. Furthermore, the optimal cutoff values for compacted morula (94.9 hours) and regular blastocyst (113.9 hours) were determined using the receiver operator characteristic curve analysis. Embryos that formed compacted morulae within 94.9 hours and developed into regular blastocysts within 113.9 hours were associated with a significantly higher pregnancy rate than those that did not (44.4% vs 16.0%).

conclusionThe timing of morula compaction and regular blastocyst formation is important as an indicator of high-quality blastocysts to increase odds for pregnancy after embryo transfer.

Indexed as

blastocyst qualitycompactionintracytoplasmic sperm injectiontime‐lapse imaging

Identifiers

PMID31956286
PMCPMC6955590
OpenAlexW2977476486

What OpenQuestion holds

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LicenceCC BY
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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.