Answer:
Sperm washing is the process in which individual sperms are separated from the semen. Washed sperm is used in artificial insemination using the intrauterine insemination (IUI) technique and in in vitro fertilization (IVF). It may also be used to decrease the risk of HIV transmission by an HIV-positive male, in which case the washed sperm is injected into a female using an artificial insemination technique.
Sperm washing involves removing any mucus and non-motile sperm in the semen to improve the chances of fertilization and to extract certain disease-carrying material in the semen. Sperm washing is a standard procedure in infertility treatment.
Explanation:
Sperm washing takes place in a laboratory following sperm donation.
Sperm may be washed by density gradient centrifugation or by a "direct swim-up" technique that does not involve centrifugation. In normal semen samples, centrifugation causes no more DNA damage to spermatozoa than a direct swim-up technique.[1]
Washed sperm is concentrated in Hams F10 media without L-glutamine, warmed to 37 °C (99 °F).[2] A chemical known as a cryoprotectant is added to the sperm to aid the freezing and thawing process.[3] Further chemicals may be added which separate the most active sperm in the sample, as well as extend or dilute the sample so that vials for a number of inseminations are produced.
<span>Type 2 diabetes, being the form of diabetes acquired in later life, usually around age 40, rather than the congenital type, comprises the vast majority of diabetes cases worldwide. The percentages of sufferers with the different types varies slightly in different countries but is broadly similar: in the UK, 90% of diabetes sufferers have Type 2 diabetes. Therefore (d) is the correct answer.</span>
<u>Quel est le plus grand nombre de personnes qui souffrent d'asthme au Royaume - Uni </u>
C) 452900
When the server's score is an even number, he serves from the right service court. When his score is an odd number, he serves from the left service court.
Answer:
Fat is stored throughout the body in fat cells known as adipocytes. The number of adipocytes an individual has is determined by late adolescence and rarely changes during adulthood. However, fat cells can increase and decrease in size depending on the amount of fat that the body is storing.
Explanation:
