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Related Concept Videos

Cleavage and Blastulation01:33

Cleavage and Blastulation

After a large-single-celled zygote is produced via fertilization, the process of cleavage occurs while zygotes travel through the uterine tube. Cleavage is a mitotic cell division that does not result in growth. With each round of successive cell division, daughter cells get increasingly smaller.
Zygotic Development And Stem Cell Formation01:10

Zygotic Development And Stem Cell Formation

The development of all multicellular organisms starts with the fusion of haploid cells called sperm and egg to form a diploid zygote. A zygote is a totipotent cell that can develop into a complete organism. The zygote undergoes cell division or cleavage to form an 8-cell mass. Until this stage, the cells are spherical, loosely attached, and remain totipotent. Totipotent cells are capable of developing both the embryonic and the extraembryonic tissues. However, as they continue to divide, they...
Gastrulation01:56

Gastrulation

Gastrulation establishes the three primary tissues of an embryo: the ectoderm, mesoderm, and endoderm. This developmental process relies on a series of intricate cellular movements, which in humans transforms a flat, “bilaminar disc” composed of two cell sheets into a three-tiered structure. In the resulting embryo, the endoderm serves as the bottom layer, and stacked directly above it is the intermediate mesoderm, and then the uppermost ectoderm. Respectively, these tissue strata will form...
Development of the Sexual Organs in the Embryo and Fetus01:15

Development of the Sexual Organs in the Embryo and Fetus

Development of the reproductive organs in an embryo starts from a bipotential state. This means the early embryo can develop either male or female reproductive organs. The formation of these organs begins with the growth of gonadal ridges that arise from the intermediate mesoderm during the fifth week of development.
Near the gonadal ridges, two duct systems are present: the mesonephric ducts (Wolffian ducts) and paramesonephric ducts (Müllerian ducts). These ducts form the basis for the male...

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Related Experiment Video

Updated: May 25, 2026

Single Cell Collection of Trophoblast Cells in Peri-implantation Stage Human Embryos
08:50

Single Cell Collection of Trophoblast Cells in Peri-implantation Stage Human Embryos

Published on: June 12, 2020

Human pre-implantation embryo development.

Kathy K Niakan1, Jinnuo Han, Roger A Pedersen

  • 1Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, UK.

Development (Cambridge, England)
|February 10, 2012
PubMed
Summary
This summary is machine-generated.

Human pre-implantation development is crucial for assisted reproductive technology and stem cell therapies. Further research using advanced techniques will improve these applications and unlock the potential of human embryonic stem cells.

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Last Updated: May 25, 2026

Single Cell Collection of Trophoblast Cells in Peri-implantation Stage Human Embryos
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07:14

Ex Utero Culture of Mouse Embryos from Pregastrulation to Advanced Organogenesis

Published on: October 19, 2021

Area of Science:

  • Developmental Biology
  • Reproductive Medicine
  • Stem Cell Biology

Background:

  • Human pre-implantation development is critical for reproductive success and regenerative medicine.
  • Current understanding of early human embryonic development is limited due to resource constraints.
  • Advances in imaging and molecular technologies are enhancing research in this field.

Purpose of the Study:

  • To summarize current knowledge on human pre-implantation embryo development.
  • To highlight the potential of studying pre-implantation embryos for improving assisted reproductive technology (ART).
  • To explore how research on pre-implantation embryos can advance human embryonic stem cell (hESC)-based therapies.

Main Methods:

  • Review of recent advances in non-invasive imaging techniques.
  • Analysis of molecular and genomic technologies applied to early human development.
  • Synthesis of existing literature on human pre-implantation embryology.

Main Results:

  • Significant progress has been made in understanding early human development through new technologies.
  • Knowledge gaps persist regarding the detailed cellular and molecular mechanisms.
  • Pre-implantation embryo research offers pathways to enhance ART outcomes.

Conclusions:

  • Continued investigation of human pre-implantation development is essential.
  • Improved understanding will directly benefit assisted reproductive technology.
  • Harnessing the potential of human embryonic stem cells for therapy requires further study of early development.