Cryobiology is the branch of biology that studies the effects of low temperatures on living things, from whole animals and plants to organs and individual cells. This category also includes companies which research and store frozen tissue for transplant and other uses.
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"Cryonics" is an experimental procedure whereby patients who can no longer be kept alive with today's medical abilities are preserved at low temperature for treatment in the future. The media think of this as "freezing people," but the field is more complex than that.
Cryonics is not the same as "cryogenics," a more general term referring to a branch of physics and engineering concerned with the production of very low temperatures (e.g. by producing and storing liquid nitrogen, helium, and oxygen). See the link for "Cryotechnology."
Also included here are a few sites about "nanotechnology," a new field concerned with the manipulation of individual atoms and molecules. Cryonics researchers assume that some form of nanotechnology may be required to revive the patients preserved by cryonics techniques.
The technology of freezing sperm and ova (eggs) is often used to provide donor sperm or eggs for the treatment of infertility, although people often choose to store their own sperm, eggs, or fertilized embryos as a backup in case they should want to produce children in the future.
This category is for sites which discuss the technology of frozen storage of human or animal sperm, ova (eggs), and embryos.
Sites for clinics and services are not listed here, and belong in Health/Reproductive_Health/Infertility/Clinics_and_Services or Health/Reproductive_Health/Infertility/Donor_Services/
Cryopreservation of umbilical cord blood stem cells, harvested at the birth of a child. This provides an exact match for children in the event they need a bone marrow transplant as a part of a treatment for diseases like leukemia. Recent research has shown that other family members needing bone marrow transplants may also benefit from stored cord blood stem cells.