Wuhan sperm caused sudden death final sentence of the proceedings, once again sparked concern. Why do I need sperm? Sperm and human health hazard? Sperm can lead to death it? The traditional view that "exhausted and death of people," Is it true? Why are young sudden death occur? Modern science can give a clear answer.
Third-party-Assisted Procreation
Sexual reproduction method requires binding bisexual sperm and egg cells, also known as the fertilized zygote is formed and further develop into embryos, fetuses to complete. Enter civilized society, offspring is defined between the legitimate spouses or regular partners, if one of the parties once for some reason can not have children, they suffer from the so-called infertility.
If a party completely lost fertility, or because of serious genetic diseases is not suitable for fertility, fertility completed "task" will require third-party assistance to complete. Assisted fertility in ancient times, such as "by race" and "belly twins" and that third party, but this primitive way contrary to human morality and ethics.
Modern medicine in vitro fertilization (In Vitro Fertilization, IVF), that is popular in terms of IVF assisted reproductive technology makes this third party to assist fertility more "clean." According to the nature of infertility requires third-party donor sperm, egg, or "borrow" the uterus (ie, when the female can produce eggs and lose the uterus or womb can not be completed conceive offspring ability, in vitro fertilization and embryo implantation preliminary cultivation third party uterine modern version of "belly twins.") sperm donation
Sperm donation is complete IVF technology to solve male infertility or fertility is not suitable steps necessary, various countries and regions have formed a legal and ethical norms of their different but similar. According to China's "human sperm bank management approach", sperm donors should be aged between 22 and a 45 year old healthy male. Sperm bank sperm donors should undergo a medical examination and strict screening may collect semen staff of the following circumstances: (1) there is a family history of genetic disease or suffering from hereditary (2) mental (3) patients or carriers of pathogens of infectious (4) long-term exposure to radiation and hazardous substances (5) semen unqualified (6) other serious organic disease patients. A fine for those who can only provide sperm for five pregnant women.
Sperm mainly through masturbation or with sperm retrieval is given appropriate stimulation ejaculation acquire, and in the shortest possible time (within 2-3 hours) for processing, and after cryopreservation six months after re-inspection square It can be provided for clinical use.
Sperm there is no health hazard?
To clarify this issue, we first need to understand semen, sperm formation and composition of its functions.
semen:
Sperm from the testes to produce sperm, the seminal vesicles, prostate and bulbourethral gland secretions constitute. The remaining ingredients except the sperm outside the seminal plasma, also known as the main ingredient is water, a small amount of fructose, proteins, and trace enzymes and hormones and other substances such as prostaglandins, the main function is to provide protection and support for the sperm. Healthy young adults per ejaculate about 2 to 6 ml, containing about 30 million to 300 million sperm.
The formation of sperm:
Sperm by the testes seminiferous tubules of the seminiferous epithelium cells from. After the male puberty, gonadal original substantive lines gradually transformed into a tube in adolescence total length of about 50 to 60 centimeters, into adulthood total length of 300? 350 m. Seminiferous tubule from the seminiferous epithelium and Sertoli cells (trophoblast cells) constituted about one billion adults spermatogenic cells, and can keep dividing.
Seminiferous epithelium is first converted into spermatogonia, spermatogonia undergo mitosis form a primary spermatocytes, this process lasted 16 level spermatocytes after the first meiosis become secondary spermatocytes, which lasted 24 secondary spermatocytes after the second meiosis, this split without DNA replication, recombination, respectively arranged only sister chromatid from the parent and the parent body, the formation of sperm cells contain chromosomes half of the mother cell, it is also called meiosis , which lasted about five round sperm cells through a complex called "sperm abnormal" during the development of mature, showing a tadpole-shaped, has a strong athletic ability of sperm, this process is completed in the epididymis, which lasted 24 day.
The entire process of sperm production experienced about 64 days cycle.
A spermatogonial cell division twice, but only once DNA replication, and finally the formation of four sperm, only half of each chromosome sperm cells in general. Therefore, also known as male sperm haploid gametes, and the same as the haploid female gametes fertilized egg formation of the future, also known as zygote, so back to normal diploid chromosome status. Meanwhile, sister chromatid recombination during meiosis can also prevent sperm chromosomes are arranged between the same, there can be embodied as genetic information identical offspring, the source of this genetic diversity is the biological adaptive evolution.
Mature sperm stored in the epididymis among short-lived, if not eliminated from the body, the sperm will be re-absorbed by the body the death of aging. Therefore, sperm production and aging in a constant dynamic process of death, according to a new study, human testicular sperm per second can generate 1500, that is to say before the aging testis, sperm healthy adults described as "inexhaustible , inexhaustible. "
Ejaculation:
Whether it is the natural state of sexual intercourse, sperm or sperm needs are properly stimulation makes male orgasm, sperm from the epididymis, vas deferens and seminal vesicles were mixed in ampulla secretion, reach parts of the prostate and prostatic fluid mixed semen into the final exit through the urethra in vitro.
Sperm sperm retrieval process at best, is the equivalent of first sexual intercourse, and often physical exercise, the degree of excitement and elapsed time are generally inferior sex. More simply, sperm retrieval process is nothing more than a masturbation, but usually men who have not had a lifetime of at least thousands of masturbation do? Masturbation harmless has become the consensus of mankind, so that the sperm sperm would not be any health hazards.
So, regardless of sperm, semen is lost, or the excitement of sperm retrieval process, the body will not cause any health hazard, not to have any contact with life and death.
Chinese traditional medicine has "innate essence, acquired refined" saying this "fine" obviously does not refer to or exactly the same as semen or sperm, found in literary works "exhausted and death of people," the statement is no evidence to support .
Wuhan sperm deaths occur is how it happened?
Very simple, coupled with the sudden death of an event of sperm process.
Why do people of sudden death:
Healthy people do not have any signs of sudden death, we call sudden death. Over 90% of sudden death due to cardiac causes, also called sudden cardiac death.
According to the American Heart Association, according to reports, when the heart electrical system failure or loss of electrical cardiac reactions, prone to ventricular tachycardia or ventricular fibrillation, cardiac arrest and then, if there is no prompt and proper treatment, within minutes of death, that is, sudden cardiac death.
Young sudden death is very rare, more than two thirds are caused by cardiac arrest, the main reason is the specific hypertrophic cardiomyopathy, but also includes coronary artery abnormalities, long QT syndrome, and some mild or without symptoms (silent) congenital heart disease.
Thus, the occurrence of sudden death in young people although on the surface with ordinary people no different, in fact, "healthy" and they are not in the true sense, their bodies buried a time bomb, and any factors that could detonate the bomb sudden death. Some similar quarrel, sexual intercourse, strenuous exercise (such as marathon running often controversial events of the dead and other playground sudden death), including Wuhan sperm "death" event, but the event is a coupling between the two does not exist any causal link.
In summary, sperm and blood and hematopoietic stem cell donors as a helping behavior, for their own health completely harmless, it occurred in Wuhan doctoral sperm "fatal events" is nothing but an unexpected event coupling.
Licensing and commercial cooperation, please contact zhidaoribao@baidu.com, Baidu know the daily chase responsibility and rights reserved.
Article Source: Baidu know daily (http://zhidao.baidu.com/daily)
Original link: http: //zhidao.baidu.com/daily/view id = 2702?