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Updated: Jan 26, 2026

Human Blastocyst Biopsy and Vitrification
Published on: July 26, 2019
Safer Vitrification of Mouse and Human Embryos Using the Novel Cryoroom Vitrification System for Assisted
H Inui1, J Mizuno2, E Kikuchi1
1Inui Institute for Frontier Reproductive Medicine and Infertility, Inui Maternity Clinic, Koriyama, Fukushima, Japan.
Background:
Vitrification is widely used for assisted reproductive technology (ART). Most vitrification devices require the skillful placement of embryos into the carrier and aspiration of excessive vitrification solution.
Objective:
To evaluate the efficacy and safety of the Cryoroom as a vitrification device.
Materials And Methods:
Mouse and human embryos were vitrified with Cryoroom or Cryotop, and the developmental potency was assessed in vitro. Mouse monozygotic twin blastocysts were vitrified with Cryoroom or Cryotop for microarray analysis.
Results And Discussion:
In mouse and human embryos, there were no differences between the survival and developmental progress in each device. In silico, the Cryoroom device showed no changes, particularly in DNA methylation after vitrification compared with the Cryotop. These results showed that the form and function of the device may affect the gene expression levels in vitrified embryos.
Conclusion:
The Cryoroom represents a safe and potentially revolutionary vitrification device for ART.
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