What is frozen essence?
Frozen sperm is frozen sperm, that is, men's future fertility plan considers, freezing their sperm in medical institutions with corresponding qualifications to prevent future fertility risks.
Sperm frozen technology is relatively mature. Sperm frozen can be used as a kind of auxiliary fertility. Some very serious patients with young sperm can be preserved for precious sperm frozen during the treatment process to perform single sperm injection in cell plasma.Treatment is to prevent the development of no sperm in the future, so that it has completely lost the ability to be a father.
Will frozen sperm deteriorate?
In the eyes of some people, sperm frozen recovery is just like the frozen frozen frozen in the refrigerator in their home, and it will deteriorate.But in fact, this is not the case.At present, the sperm freezing technology is quite mature. Once the sperm that is added to the protective agent is preserved, its biological activity stops, which means that the sperm is not deteriorated.
Clinically collect the semen that ejaculated by masturbation. After taking a small amount of sampling examination, the remaining protective agent is added, and the ultra -low temperature (more than 100 ° C) is frozen.When it is necessary, the samples of the storage sperm are purse in the room temperature and immersed in tap water or double steaming water or exposed to air (both are performed at about 22 ° C at room temperature).
Adding a protective agent can prevent the volume of the volume of the cells and the cell membrane.However, in the process of thawing, about half of the sperm cells will die. There are many reasons. For example, when the ice crystals of sperm cells are melted, the internal liquid will be exchanged with the extracellular storage liquid.It will destroy sperm cells.
But the remaining sperm, if the vitality is good, is enough to perform auxiliary fertility technology.In theory, only one sperm is needed. If the number of healthy sperm is too small, you can use a micro -injection method to inject sperm into eggs one by one.
How long can frozen sperm be preserved?
After the sperm is frozen, the biological activity stops and can be kept in theory for a long time.
Ian Morris's sperm is the most typical example.Moreover, he is not the longest. In 2004, St. Mary Hospital of Manchester, Britain, announced a sensation that caused a sensation in the medical community: A 32 -year -old mother used IVF technology to give birth to a baby boy in 2002, andThe sperm she used was actually frozen for 21 years & mdash; & mdash; in 1979, she was a sperm refrigerated before the treatment of testicular cancer surgery.
Whether you can conceive is not in the freezing time, depending on the vitality of sperm after thawing.It is not clear whether the frozen sperm stored for a long time will bring danger to the health of the child when they grow up.Animal experiments show that the descendants breed by frozen sperm will be more susceptible to disease. Whether human frozen sperm will be the case is not studied.
In addition, if the freezing time is too long, it is easy to cause ethical problems.If a man frozen his sperm for some reason 50 years ago, if these sperm successfully conceived the women in 50 years, for the man’s children and grandchildren, whether the baby who had just given birth was their elder or junior or juniors or juniors.Intersection
Therefore, due to the consideration of health factors and ethics, foreign countries have regulations abroad. For example, the British artificial fertilization and embryonic tissue stipulate that men can refrigerate sperm at 55 years, and the longest freezing time for sperm must not exceed 10 years.
Can cancer patients frozen sperm?
Sperm frozen can provide fertility remedy for cancer patients.
Radiotherapy and chemotherapy of cancer patients can cause mutations in sperm and even lose their fertility.For example, testicular cancer, this kind of male disease of men aged 15 & mdash; 44 -year -old, young patients can lose their fertility even if they can be cured by luck.These people can freeze sperm before treatment.
Cancer patients, if external factors cause mutations in local cells, are not metastasized, and sperm will not be attacked. If they are genomic diseases, the sperm DNA will be mostly abnormal.However, cancer is a multi -factor disease. Carrying with cancer genes may not get cancer. The child you give birth can grow healthily as long as you pay attention to your habits.
(Editor in charge: Wang Shaohua)
