Evidence map›Paper›PMID 36792779›Full record

ReviewNature protocols2023

Generating human blastoids modeling blastocyst-stage embryos and implantation.

Heidar Heidari Khoei, Alok Javali, Harunobu Kagawa, Theresa Maria Sommer, Giovanni Sestini, Laurent David, Jana Slovakova, Maria Novatchkova, Yvonne Scholte Op Reimer, Nicolas Rivron

Abstract readReview
In one paragraph

Review in Nature protocols, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers.

0numbers the graph read from it
0cells of the map it votes in
29citing 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

29 citing papers in PubMed.

  1. Article
  2. Review
  3. Observational
  4. Article
  5. Article
  6. Review
  7. Synthetic embryos: current progress, application and challenges.Reproductive biology and endocrinology : RB&E · 2026
    Review
  8. Review
  9. Article
  10. Article
  11. Modeling Post-Implantation Mammalian Embryogenesis Using AdvancedInternational journal of molecular sciences · 2026
    Review
  12. Review
  13. Review
  14. Observational
  15. Article
  16. Review
  17. Article
  18. Article
  19. Review
  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

10 authors.

Heidar Heidari Khoei *Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenter (VBC), Vienna, Austria.
Alok Javali *Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenter (VBC), Vienna, Austria.
Harunobu Kagawa *Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenter (VBC), Vienna, Austria.
Theresa Maria SommerInstitute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenter (VBC), Vienna, Austria.
Giovanni SestiniInstitute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenter (VBC), Vienna, Austria.ORCID http://orcid.org/0000-0002-6643-7585
Laurent DavidUniversité de Nantes, CHU Nantes, Inserm, CR2TI, UMR 1064, Nantes, France.ORCID http://orcid.org/0000-0003-3594-0353
Jana SlovakovaInstitute of Molecular Biotechnology of the Austrian Academy of Science (IMBA), IMBA Stem Cell Core Facility (ISCCF), Vienna BioCenter (VBC), Vienna, Austria.
Maria NovatchkovaInstitute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenter (VBC), Vienna, Austria.
Yvonne Scholte Op ReimerInstitute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenter (VBC), Vienna, Austria.ORCID http://orcid.org/0000-0002-1656-9221
Nicolas RivronInstitute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenter (VBC), Vienna, Austria. nicolas.rivron@imba.oeaw.ac.at.ORCID http://orcid.org/0000-0003-1590-5964

Funding

Austrian Science Fund FWF M 3131European Research Council 101002317
6 · The paper itself

Abstract

Human early development sets the stage for embryonic and adult life but remains difficult to investigate. A solution came from the ability of stem cells to organize into structures resembling preimplantation embryos-blastocysts-that we termed blastoids. This embryo model is available in unlimited numbers and could thus support scientific and medical advances. However, its predictive power depends on how faithfully it recapitulates the blastocyst. Here, we describe how we formed human blastoids that (1) efficiently achieve the morphology of the blastocyst and (2) form lineages according to the pace and sequence of blastocyst development, (3) ultimately forming cells that transcriptionally reflect the blastocyst (preimplantation stage). We employ three different commercially available 96- and 24-well microwell plates with results similar to our custom-made ones, and show that blastoids form in clinical in vitro fertilization medium and can be cryopreserved for shipping. Finally, we explain how blastoids replicate the directional process of implantation into endometrial organoids, specifically when these are hormonally stimulated. It takes 4 d for human blastoids to form and 10 d to prepare the endometrial implantation assay, and we have cultured blastoids up to 6 d (time-equivalent of day 13). On the basis of our experience, we anticipate that a person with ~1 year of human pluripotent stem cell culture experience and of organoid culture should be able to perform the protocol. Altogether, blastoids offer an opportunity to establish scientific and biomedical discovery programs for early pregnancy, and an ethical alternative to the use of embryos.

Indexed as

BlastocystEmbryo ImplantationAdultCryopreservationEmbryo, MammalianEmbryonic DevelopmentFemaleHumansPregnancy

Identifiers

PMID36792779
PMCPMC7617227

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.