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Artificial insemination (AI) is the deliberate introduction of sperm into a female's cervix or uterine cavity for the purpose of achieving a pregnancy through in vivo fertilization by means other than sexual intercourse or in vitro fertilisation. It is a fertility treatment for humans, and is common practice in animal breeding, including dairy cattle and pigs.
Cryoprecipitate, also called cryo for short, is a frozen blood product prepared from blood plasma. To create cryoprecipitate, fresh frozen plasma thawed to 1–6 °C is then centrifuged and the precipitate is collected. The precipitate is resuspended in a small amount of residual plasma and is then re-frozen for storage. It is often transfused to adults as two 5-unit pools instead of as a single product. One of the most important constituents is factor VIII, which is why cryoprecipitate is sometimes called cryoprecipitated antihaemophilic factor or cryoprecipitated AHF. In many clinical contexts, use of whole cryoprecipitate has been replaced with use of clotting factor concentrates made therefrom, but the whole form is still routinely stocked by many, if not most, hospital blood banks. Cryo can be stored at −18 °C or colder for 12 months from the original collection date. After thawing, single units of cryo can be stored at 20–24 °C for up to 6 hours. If units of cryo are pooled in an open system, they can only be held at 20–24 °C for up to 4 hours. Presently cryo cannot be re-frozen for storage after it is thawed for use if it is not transfused.
Assisted reproductive technology (ART) includes medical procedures used primarily to address infertility. This subject involves procedures such as in vitro fertilization (IVF), intracytoplasmic sperm injection (ICSI), cryopreservation of gametes or embryos, and/or the use of fertility medication. When used to address infertility, ART may also be referred to as fertility treatment. ART mainly belongs to the field of reproductive endocrinology and infertility. Some forms of ART may be used with regard to fertile couples for genetic purpose. ART may also be used in surrogacy arrangements, although not all surrogacy arrangements involve ART. The existence of sterility will not always require ART to be the first option to consider, as there are occasions when its cause is a mild disorder that can be solved with more conventional treatments or with behaviors based on promoting health and reproductive habits.
A sperm bank, semen bank, or cryobank is a facility or enterprise which purchases, stores and sells human semen. The semen is produced and sold by men who are known as sperm donors. The sperm is purchased by or for other persons for the purpose of achieving a pregnancy or pregnancies other than by a sexual partner. Sperm sold by a sperm donor is known as donor sperm.
Transmission electron cryomicroscopy (CryoTEM), commonly known as cryo-EM, is a form of cryogenic electron microscopy, more specifically a type of transmission electron microscopy (TEM) where the sample is studied at cryogenic temperatures. Cryo-EM is gaining popularity in structural biology.
Sperm is the male reproductive cell, or gamete, in anisogamous forms of sexual reproduction. Animals produce motile sperm with a tail known as a flagellum, which are known as spermatozoa, while some red algae and fungi produce non-motile sperm cells, known as spermatia. Flowering plants contain non-motile sperm inside pollen, while some more basal plants like ferns and some gymnosperms have motile sperm.
Gene banks are a type of biorepository that preserves genetic material. For plants, this is done by in vitro storage, freezing cuttings from the plant, or stocking the seeds. For animals, this is done by the freezing of sperm and eggs in zoological freezers until further need. With corals, fragments are taken and stored in water tanks under controlled conditions. Genetic material in a 'gene bank' is preserved in a variety of ways, such as freezing at -196° Celsius in liquid nitrogen, being placed in artificial ecosystems, and put in controlled nutrient mediums.
The ease of doing business index was an index created jointly by Simeon Djankov, Michael Klein, and Caralee McLiesh, three leading economists at the World Bank Group. The academic research for the report was done jointly with professors Edward Glaeser, Oliver Hart, and Andrei Shleifer. Higher rankings indicated better, usually simpler, regulations for businesses and stronger protections of property rights. Empirical research funded by the World Bank to justify their work show that the economic growth impact of improving these regulations is strong. Though the first report was authored by Djankov, Klein, and McLiesh, and they continue to be listed as "founders" of the report, some sources attribute the genesis of the idea to Djankov and Gerhard Pohl. The report was discontinued by the World Bank on September 16, 2021, following the release of an independent audit of the data irregularities. The audit documented how bank leadership pressured experts to manipulate the results of the 2018 and 2020 Doing Business Reports.
The EM Data Bank or Electron Microscopy Data Bank (EMDB) collects 3D EM maps and associated experimental data determined using electron microscopy of biological specimens. It was established in 2002 at the MSD/PDBe group of the European Bioinformatics Institute (EBI), where the European site of the EMDataBank.org consortium is located. As of 2015, the resource contained over 2,600 entries with a mean resolution of 15Å.
Precision Cellular Storage is a transport quality cord blood stem cell bank, with operations in Doha and the United Kingdom. The company was formerly named Virgin Health Bank until 2018, when it closed to new business and focused on the storage of existing customers' units.
Sperm donation laws vary by country. Most countries have laws to cover sperm donations which, for example, place limits on how many children a sperm donor may give rise to, or which limit or prohibit the use of donor semen after the donor has died, or payment to sperm donors. Other laws may restrict use of donor sperm for in vitro fertilisation (IVF) treatment, which may itself be banned or restricted in some way, such as to married heterosexual couples, banning such treatment to single women or lesbian couples. Donated sperm may be used for insemination or as part of IVF treatment. Notwithstanding such laws, informal and private sperm donations take place, which are largely unregulated.
Fertility tourism is the practice of traveling to another country or jurisdiction for fertility treatment, and may be regarded as a form of medical tourism. One can usually be considered as having fertility issues when they are unable to have a clinical pregnancy after 12 months of attempts with intercourse. Infertility, or the inability to get pregnant, affects about 8-12% of couples looking to conceive or 186 million people globally. In some places, rates of infertility surpass the global average and can go up to 30% depending on the country. Areas with lack of resources, such as assisted reproductive technologies (ARTs), tend to correlate with the highest rates of infertility.
Sperm donation is the provision by a man of his sperm with the intention that it be used in the artificial insemination or other 'fertility treatment' of a woman or women who are not his sexual partners in order that they may become pregnant by him. Where pregnancies go to full term, the sperm donor will be the biological father of every baby born from his donations.
Semen extender is a liquid diluent which is added to semen to preserve its fertilizing ability. It acts as a buffer to protect sperm cells from their own toxic byproducts, as well as protecting the sperm from cold shock and osmotic shock during the chilling and shipping process. The extender allows the semen to be shipped to the female, rather than requiring the male and female to be near to each other. Special freezing extender use also allows cryogenic preservation of sperm, which may be transported for use, or used on-site at a later date.
In sperm banks, screening of potential sperm donors typically includes screening for genetic diseases, chromosomal abnormalities and sexually transmitted infections (STDs) that may be transmitted through the donor's sperm. The screening process generally also includes a quarantine period, during which samples are frozen and stored for at least 6 months after which the donor will be re-tested for STIs. This is to ensure no new infections have been acquired or have developed during since the donation. If the result is negative, the sperm samples can be released from quarantine and used in treatments.
Generation Cryo is an American reality television series that premiered on November 25, 2013, on MTV. Generation Cryo chronicles 17-year-old Breeanna who discovered her 15 half-siblings via the Donor Sibling Registry. Breeanna and her 15 siblings were conceived via sperm donors. While connecting with her half-brothers and sisters, Breeanna gets everyone together to search for their biological father.
Cryo-Cell International, Inc. is a cord blood bank. It was founded by Dan Richard in 1989. Cryo-Cell International is the first private cord blood bank to separate and store stem cells. Cryo-Cell is headquartered outside of Tampa, in Oldsmar, Florida. In January 1997, the Company's stock began trading on the NASDAQ Small Cap market under symbol CCEL.
Jacques Dubochet is a retired Swiss biophysicist. He is a former researcher at the European Molecular Biology Laboratory in Heidelberg, Germany, and an honorary professor of biophysics at the University of Lausanne in Switzerland.
Cryogenic electron microscopy (cryo-EM) is a cryomicroscopy technique applied on samples cooled to cryogenic temperatures. For biological specimens, the structure is preserved by embedding in an environment of vitreous water. An aqueous sample solution is applied to a grid-mesh and plunge-frozen in liquid ethane or a mixture of liquid ethane and propane. While development of the technique began in the 1970s, recent advances in detector technology and software algorithms have allowed for the determination of biomolecular structures at near-atomic resolution. This has attracted wide attention to the approach as an alternative to X-ray crystallography or NMR spectroscopy for macromolecular structure determination without the need for crystallization.
California Cryobank is a sperm bank in California, United States, one of the two biggest in the world. There are offices in Palo Alto, Los Angeles, Cambridge, Massachusetts, and New York. According to the company in 2018 they had about 600 donors and 75,000 registered live births since 1977. Since 2018 they no longer accept anonymous donations. They offer a service to choose sperm from donors who resemble celebrities. When they reach the age of 18 children conceived through sperm donation can ask for information about their biological fathers. The bank also offers sperm of donors who have deceased, and co-founder Cappy Rothman was the first physician who extracted sperm post mortem. In 2016 it was estimated that there had been 200 such cases.
References
- 1 2 Seed capital - The business of sperm banks, The Economist, Sep 14th 2017
- ↑ Sperm specialist: How one clinic is satisfying global demand, Alanna Petroff, CNN, October 21, 2015
- ↑ America's hottest export? Sperm, Soo Youn, The Guardian, 15 Aug 2018
- ↑ Cryos and CAN-AM Cryoservices Cement Relationship, Business Wire, August 8, 2018
