Related Experiment Video
Updated: May 12, 2026
12:09
Protocol for Human Blastoids Modeling Blastocyst Development and Implantation
Published on: August 10, 2022
Dissecting Human Embryogenesis With Blastoids: Insights Into Lineage Specification and Early Development.
Hiroo Sasaki1, Ayaka Yanagida1,2
1Department of Veterinary Anatomy The University of Tokyo Tokyo Japan.
Reproductive Medicine and Biology
|May 11, 2026
Summary
Human stem cell-based blastoids offer a powerful in vitro model for studying early human embryogenesis, overcoming ethical limitations. These models are advancing reproductive medicine by enabling research into development and implantation.
Area of Science:
- Developmental Biology
- Stem Cell Biology
- Reproductive Medicine
Background:
- Investigating human embryogenesis is crucial but ethically and technically challenging.
- Stem cell-based blastocyst models offer an in vitro alternative to study early human development.
Purpose of the Study:
- To review the literature on human stem cell-based embryo models, specifically blastoids.
- To summarize blastoid generation, diversity, and their insights into early lineage specification.
Main Methods:
- Literature review of studies and reviews on blastoids.
- Databases searched include PubMed.
- Focus on blastoid generation, model diversity, and lineage specification.
Main Results:
- Blastoids model human blastocyst development, including lineage specification and morphogenesis.
- They are useful for studying implantation, embryo-maternal interactions, and responses to perturbations.
- Limitations include incomplete lineage representation and restricted post-implantation modeling capacity.
Conclusions:
- Blastoids show promise for studying early human embryogenesis.
- Their applications are expected to expand in reproductive biology and medicine.
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01:51Determination
During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In contrast, determination...
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01:10Zygotic Development And Stem Cell Formation
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