Cryopreservation Eggs
Cryopreservation Eggs - Related Videos
11:01
A High-Throughput Method For Zebrafish Sperm Cryopreservation and In Vitro Fertilization
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Cited by 29 •
2009
This is a high-throughput sperm cryopreservation protocol for zebrafish. Sperm cryopreserved using this protocol has an average of 25% fertility in subsequent vitro fertilization and is stable over many years.
02:25
Egg Laying Assay: A Method to Quantify the Egg-Laying Behavior of C. elegans
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2023
C. elegans egg-laying behavior can provide important information in developmental, reproductive, and anatomical studies. This video introduces the important steps of an egg laying assay and shows a sample experiment in which a drug is tested for reproductive toxicity.
07:06
Mouse Sperm Cryopreservation and Recovery using the I·Cryo Kit
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Cited by 5 •
2011
Here we demonstrate the newly developed I•Cryo kit for mouse sperm cryopreservation. Two-cell stage embryo development with frozen-thawed sperm was improved consistently in 5 mouse strains with the use of this kit. Over a 1.5 year period, 49 genetically modified mouse lines were archived by sperm cryopreservation with the I•Cryo kit and later successfully recovered by IVF.
07:05
Isolation and Cryopreservation of Neonatal Rat Cardiomyocytes
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Cited by 49 •
2015
The isolation of neonatal rat cardiomyocytes is a time consuming and unpredictable procedure. This study describes methods for cryopreservation and thawing of neonatal rat cardiomyocytes that allows for more efficient use of cells. The thawed NRCMs can be used for various experiments without the need for performing isolations each time.
03:26
Drosophila Egg Collection and Dechorionation: A Method to Remove the Outermost Egg Layer
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2023
The Drosophila embryo is surrounded by protective outer membranes. To gain access to the embryo, the chorion–the outermost of the membranes–is often removed. This video describes a commonly used method of dechorionation using sodium hypochlorite. The example protocol demonstrates the procedure while employing sterile techniques necessary for axenic or gnotobiotic animal rearing.
FAQs
Vitrification uses cryoprotective solutions and rapid cooling to place mature oocytes in a glass-like state. This sharply limits ice-crystal formation, which is important because crystals can contribute to cellular damage during freezing. The approach therefore focuses on physical stabilization of the oocyte rather than gradual freezing alone.
Cryoprotective solutions are central because they help prepare the oocyte for rapid cooling and later removal during warming. Their use must be considered as part of the full preservation sequence, not as an isolated treatment. In this context, they support the glass-like state that reduces ice-crystal formation and associated cellular damage.
The described vitrification approach is applied to mature oocytes rather than eggs at an unspecified developmental stage. This detail identifies the biological material being preserved and links the procedure to later fertilization or analysis. It also helps researchers interpret results in relation to oocyte quality, development, and reproductive aging.
Controlled warming reverses the preservation sequence by bringing vitrified oocytes back from ultra-low-temperature storage and removing the cryoprotectants. This step prepares the eggs for their intended next use, either fertilization or analysis. Because warming follows rapid cooling, it is an essential part of the overall method rather than a separate recovery procedure.
The workflow begins with mature oocytes, exposes them to cryoprotective solutions, and rapidly cools them in liquid nitrogen to create a glass-like state. Later, controlled warming removes the cryoprotectants and prepares the eggs for fertilization or analysis. These linked steps preserve the material while maintaining a defined route toward its later use.
Egg cryopreservation can support fertility preservation and in vitro fertilization when oocytes need to remain available for later reproductive use. The preserved eggs are subsequently warmed and prepared for fertilization. This application extends the time in which viable eggs can support assisted reproduction, according to the stated biological context.
In biology studies, preserved oocytes can be examined in relation to quality, development, and reproductive aging. This makes the technique useful not only for storing material but also for extending the time available to analyze oocyte-related questions. The supplied context does not specify particular assays, so interpretation remains focused on these research areas.