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Related Concept Videos

In Vitro Fertilization01:24

In Vitro Fertilization

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In vitro fertilization (IVF) is a form of assisted reproductive technology where an egg is fertilized with sperm in a controlled laboratory environment before transferring the resulting embryo into the uterus. This process is designed to help individuals and couples experiencing difficulties conceiving.
The IVF process begins with ovarian stimulation, during which reproductive endocrinologists prescribe hormonal medications to stimulate the ovaries to produce multiple eggs instead of the single...
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Reproductive cloning is the process of producing a genetically identical copy—a clone—of an entire organism. While clones can be produced by splitting an early embryo—similar to what happens naturally with identical twins—cloning of adult animals is usually done by a process called somatic cell nuclear transfer (SCNT).
Somatic Cell Nuclear Transfer
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The first successfully cloned mammal was Dolly, a sheep, born on 5th July 1996 at Roslin Institute, Scotland. The cloned sheep was named after the American singer Dolly Parton. Dolly lived for seven years and died of respiratory complications, which is speculated to be due to the actual age of her DNA. Because the DNA in cloned cells belongs to an older individual,  the cloned individual’s life expectancy may be affected. Indeed, analysis of Dolly’s DNA revealed shorter...
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Nuclear reprogramming is a process of transforming one cell type into an unrelated cell type by epigenetic changes that alter the cell’s original gene expression pattern. Such epigenetic changes force cells to express a different set of genes, which play a significant role in inducing transformation into other cell types. Nuclear reprogramming offers applications in reproductive cloning for livestock propagation and regenerative medicine — developing patient-specific cells for...
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Genome editing technologies allow scientists to modify an organism’s DNA via the addition, removal, or rearrangement of genetic material at specific genomic locations. These types of techniques could potentially be used to cure genetic disorders such as hemophilia and sickle cell anemia. One popular and widely used DNA-editing research tool that could lead to safe and effective cures for genetic disorders is the CRISPR-Cas9 system. CRISPR-Cas9 stands for Clustered Regularly Interspaced...
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Meiosis II is the second and final stage of meiosis. It relies on the haploid cells produced during meiosis I, each of which contain only 23 chromosomes—one from each homologous initial pair. Importantly, each chromosome in these cells is composed of two joined copies, and when these cells enter meiosis II, the goal is to separate such sister chromatids using the same microtubule-based network employed in other division processes. The result of meiosis II is two haploid cells, each...
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Related Experiment Video

Updated: Sep 20, 2025

Fertility Preservation Through Oocyte Vitrification: Clinical and Laboratory Perspectives
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Where will science take assisted reproduction?

Marcelle I Cedars1

  • 1Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, School of Medicine, San Francisco, California.

Fertility and Sterility
|May 22, 2025
PubMed
Summary
This summary is machine-generated.

Future assisted reproduction technologies, including in vitro gametogenesis and germline editing, show promise for treating infertility and preventing genetic diseases. Ethical considerations are crucial for responsible implementation of these advanced reproductive technologies.

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Area of Science:

  • Reproductive biology
  • Assisted reproductive technology
  • Bioethics

Background:

  • Advances in gamete/embryo biology are paving the way for future reproductive innovations.
  • Current assisted reproduction techniques face limitations, necessitating novel approaches.

Purpose of the Study:

  • To explore the future of assisted reproduction and gamete/embryo biology.
  • To review progress in in vitro gametogenesis and germline editing.
  • To address the ethical and legal implications of emerging reproductive technologies.

Main Methods:

  • Review of current scientific literature on female germ cell development.
  • Analysis of germline editing potential for monogenic diseases.
  • Discussion of ethical and legal frameworks for new reproductive technologies.

Main Results:

  • Significant progress in understanding female germ cell development and oogenesis.
  • Germline editing offers potential to prevent transmission of severe inherited disorders.
  • Critical ethical and legal questions surround the application of these technologies.

Conclusions:

  • In vitro gametogenesis and germline editing represent the future of assisted reproduction.
  • Careful consideration of ethical and legal issues is paramount for the responsible integration of these technologies.