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Related Concept Videos

Cryo-electron Microscopy01:28

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Conventional electron microscopy (EM) involves dehydration, fixation, and staining of biological samples, which distorts the native state of biological molecules and results in several artifacts. Also, the high-energy electron beam damages the sample and makes it difficult to obtain high-resolution images. These issues can be addressed using cryo-EM, which uses frozen samples and gentler electron beams. The technique was developed by Jacques Dubochet, Joachim Frank, and Richard Henderson, for...
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Related Experiment Video

Updated: Feb 16, 2026

Cryopreservation of Preimplantation Embryos of Cattle, Sheep, and Goats
11:10

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Theory about the Embryo Cryo-Treatment.

Iavor K Vladimirov1,2, Desislava Tacheva1,2, Antonio Diez3,4,5

  • 1In vitro Fertilization Unit Sofia Hospital of Obstetrics, Gynaecology and Reproductive Medicine Sofia Bulgaria.

Reproductive Medicine and Biology
|December 21, 2017
PubMed
Summary

Embryo cryopreservation offers therapeutic benefits beyond storage. Freezing and thawing embryos activates hormesis, a stress response that enhances embryo repair, improving implantation and pregnancy outcomes.

Keywords:
cryopreservationembryoembryo transfermitochondriapregnancy

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Area of Science:

  • Reproductive biology
  • Assisted reproductive technology

Background:

  • Cryopreservation of embryos is a key technique in assisted reproductive technology (ART).
  • Beyond storage, cryopreservation may act as a therapeutic treatment to improve ART success rates for infertile couples.

Purpose of the Study:

  • To propose a hypothesis explaining the benefits of embryo freezing and thawing.
  • To investigate the potential therapeutic effects of cryopreservation on embryo recovery and implantation.

Main Methods:

  • Analysis of multiple ART results lacking clear explanations.
  • Evidence suggests a 'therapeutic' effect of embryo freezing/thawing on embryo recovery and implantation.

Main Results:

  • Embryo freezing/thawing activates endogenous survival and repair mechanisms, a hormetic response.
  • This process improves success rates for embryo transfer (ET) in older women and enhances perinatal parameters.
  • Controlled stress from thawing can trigger biological responses that repair mitochondrial and protein damage.

Conclusions:

  • Cryopreservation activates a hormetic response, enhancing mitochondrial function and embryo survival.
  • This hormetic effect impacts implantation rates, miscarriage risks, and overall pregnancy development.
  • The study highlights cryopreservation's role in improving ART outcomes through controlled stress adaptation.