gonadectomy

• n.

• 性腺摘出、性腺摘出術、去勢

WordNet

1. of grammatical gender; "`it is the third-person singular neuter pronoun"
2. a gender that refers chiefly (but not exclusively) to inanimate objects (neither masculine nor feminine)
3. having no or imperfectly developed or nonfunctional sex organs (同)sexless
4. deprive of strength or vigor; "The Senate emasculated the law" (同)castrate
5. remove the testicles of a male animal (同)castrate, demasculinize, demasculinise
6. loss of power and masculinity

PrepTutorEJDIC

1. (文法で)中性の / (文法で)中性,中性名詞(形容詞,代名詞) / …‘を'去勢する
2. …‘を'去勢する / …‘を'無力にする / 去勢された,骨抜きの
3. 〈動物のおす〉'を'去勢する;〈めす〉‘の'卵巣を除去する;;〈植物〉'を'去葯(やく)する
4. 去勢 / 骨抜き,無力化

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/07/11 14:47:09」(JST)

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Not to be confused with Penectomy or Penis removal.

A medical illustration by Sharaf ad-Din depicting an operation for castration, c. 1466

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Castration (also known as gonadectomy) is any action, surgical, chemical, or otherwise, by which an individual loses use of the testicles. Surgical castration is bilateral orchiectomy (excision of both testes), and chemical castration uses pharmaceutical drugs to inactivate the testes. Castration causes sterilization (preventing them from reproducing); it also greatly reduces the production of certain hormones, such as testosterone. Surgical castration in animals is often called neutering.

The term "castration" is sometimes also used to refer to the removal of the ovaries in the female, otherwise known as an oophorectomy or, in animals, spaying. Estrogen levels drop precipitously following oophorectomy, and long-term effects of the reduction of sex hormones are significant throughout the body.

Castration of non-human animals is intended to favour a desired development of the animal or of its habits or to prevent overpopulation.

History

The Castration of Uranus: fresco by Vasari & Cristofano Gherardi (c. 1560, Sala di Cosimo I, Palazzo Vecchio, Florence).

Castration was frequently used for religious or social reasons in certain cultures in Europe, South Asia, Africa, and East Asia. After battles in some cases, winners castrated their captives or the corpses of the defeated to symbolize their victory and seize their "power". Castrated men — eunuchs – were often admitted to special social classes and were used particularly to staff bureaucracies and palace households: in particular, the harem. Castration also figured in a number of religious castration cults. Other religions, such as Judaism, were strongly opposed to the practice. The Leviticus Holiness code, for example, specifically excludes eunuchs or any males with defective genitals from the priesthood, just as castrated animals are excluded from sacrifice.

Eunuchs in China had been known to usurp power in many eras of Chinese history, most notably in the Later Han, late Tang and late Ming Dynasty. There are similar recorded Middle Eastern events.

In ancient times, castration often involved the total removal of all the male genitalia. This involved great danger of death due to bleeding or infection and, in some states, such as the Byzantine Empire, was seen as the same as a death sentence. Removal of only the testicles had much less risk.

Either surgical removal of both testicles or chemical castration may be carried out in the case of prostate cancer. Testosterone-depletion treatment (either surgical removal of both testicles or chemical castration) is used to slow down the cancer, greatly reduce sex drive or interest in those with sexual drives, obsessions, or behaviors, or any combination of those that may be considered deviant. Castration in humans has been proposed, and sometimes used, as a method of birth control in certain poorer regions.

Castration has also been used in the United States for sex offenders to ensure they will not commit such crimes ever again

Trans women often undergo orchiectomy, as do some other transgender people. Orchiectomy may be performed as part of a more general sex reassignment surgery, either before or during other procedures. It may also be performed on someone who does not desire, or cannot afford, further surgery.

The procedure of castration as punishment during Middle-ages

Involuntary castration appears in the history of warfare, sometimes used by one side to torture or demoralize their enemies. It was practiced to extinguish opposing male lineages and thus allow the victor to sexually possess the defeated group's women.

Europe

Edward Gibbon's famous work Decline and Fall of the Roman Empire reports castration of defeated foes at the hands of the Normans during their invasions of Sicily and Italy.

In the medieval kingdom of Georgia, the pretender Demna was castrated by his uncle George III of Georgia to ensure the supremacy of George's branch of the family.

Another famous victim of castration was the medieval French philosopher, scholar, teacher, and (later) monk Pierre Abélard. He was castrated by relatives of his lover, Héloïse.

Bishop Wimund, a 12th-century English adventurer and invader of the Scottish coast, was castrated.

In medieval England those found guilty of high treason were hanged, drawn and quartered, which often included emasculation or removal of the genitalia.

In ancient Greek mythology, Cronus castrated his father Uranus after he imprisoned his brothers.

William Wallace, the Scottish resistance leader, was castrated as part of his execution, for resistance to English rule.

Wim Deetman was criticized by the Dutch parliament for excluding evidence of castration in his report on sexual abuse by the Roman Catholic Church, where ten children were allegedly "punished" by castration in the 1950s for reporting sexual abuse by Roman Catholic priests. However, the Deetman Commission had rejected it as the person who reported the incident admitted it was speculative. Voluntary castration for homosexuality was also state policy in Netherlands at that point, as well against Catholic canon law, and there has been no evidence suggesting the Church had a part in organizing the procedures.

Chemical castration has been and is used as part of sentencing in criminal cases. At present it is employed by nine US states as well as other countries.

In 1952, Alan Turing, the father of computer science and also the inventor of Turing machine was criminally prosecuted for homosexual acts and chose chemical castration as an alternative to a period of imprisonment.

China

According to legend, during the reign of the legendary Emperor Shun and Yu in China, in 2281 BCE castration was passed into law as a punishment, which remained so until the reign of Gaozu of Tang (589–600 AD). However, it was still practiced after his reign. According to historians, it was incorporated into Chinese law during the Zhou Dynasty. It was one of the five physical punishments that could be legally inflicted on criminals in China.

Records of castrations in China date to the Shang dynasty (ca.1700–1050 BCE), when the Shang kings castrated prisoners of war.

During the reign of Mu of the Zhou Dynasty (10th c. BCE) the Minister of Crime, Marquis Lu, reformed the law in 950 BC to make it easier for people to be sentenced to castration instead of death. As long as the practice existed in China, not only were the testicles merely removed but castration included the severing of one's entire genitalia. Both organs were cut off with a knife at the same time.

Men were castrated and made into state slaves during the Qin dynasty (221–206 BCE) to perform forced labor for projects such as the Terracotta Army. The Qin government confiscated the property and enslaved the families of rapists who received castration as a punishment. Men punished with castration during the Han dynasty were also used as slave labor.

In the Han dynasty (206 BCE–220 CE), castration continued to be used as a punishment for various offences. Sima Qian, the famous Chinese historian, was castrated by order of the Han Emperor of China for dissent. In another incident multiple people, including a chief scribe and his underlings, were subjected to castration.

During the early part of the Ming Dynasty (1368–1644 CE), China demanded eunuchs to be sent as tribute from Korea. Some of them oversaw the Korean concubines in the harem of the Chinese Emperor.

When the Chinese overthrew Mongol rule, many Mongols were castrated and turned into eunuchs. When the Ming army finally captured Yunnan from Mongols in 1382, thousands of prisoners were killed and, according to the custom in times of war, their young sons – including Zheng He – were castrated.

During the Miao Rebellions (Ming Dynasty), Chinese commanders castrated thousands of Miao boys when their tribes revolted, and then distributed them as eunuch slaves as gifts to various officials.

At the end of the Ming Dynasty, there were about 70,000 eunuchs (宦官 huànguān, or 太監 tàijiàn) employed by the emperor, with some serving inside the Imperial palace.

Non-Han peoples

Many of the non-Han Chinese peoples who founded states in China after invading originally did not have eunuchs as part of their culture, but adopted it from the Han Chinese.

The Khitan people adopted the practice of using eunuchs from the Chinese and the eunuchs used were non-Khitan prisoners of war. The Khitan were a nomadic Mongolic people and originally did not have eunuchs as part of their culture. When the Khitan founded the Liao Dynasty they developed a harem system with concubines and wives and adopted eunuchs as part of it. All of the eunuchs were captured ethnic Chinese from the Central Plains that came from two sources. The Khitan captured Chinese people who were already eunuchs at the Jin court when they invaded of the Later Jin. Another source was during their war with the Chinese Song dynasty, the Khitan would raid China, capture Han Chinese boys as prisoners of war and emasculate them to become eunuchs. The emasculation of captured Chinese boys guaranteed a continuous supply of eunuchs to serve in the Liao Dynasty harem. The Empress Dowager Chengtian played a large role in the raids to capture and emasculate the boys.

The Khitan Empress Dowager Xiao Chuo (Chengtian) of the Khitan Liao state took power at age 30 in 982 as a regent for her son. She personally led her own army against the Song Chinese in 986 and defeated them in battle, fighting the retreating Chinese army. She then ordered the castration of around 100 ethnic Chinese boys she had captured in China, supplementing the Khitan's supply of eunuchs to serve at her court, among them was Wang Ji'en. The boys were all under ten years old and were selected for their good looks.

The History of Liao 遼史 described and praised Empress Chengtian's capture and mass castration of Chinese boys in a biography on the Chinese eunuch Wang Ji'en.

Some legends say that the Mongol Genghis Khan was castrated by a Tangut princess using a knife, who wanted revenge against his treatment of the Tanguts and to stop him from raping her.

During the Qing (Manchu) dynasty (1644–1911 CE), the sons and grandsons of the rebel Yaqub Beg in China were all castrated. Surviving members of Yaqub Beg's family included his 4 sons, 4 grandchildren (2 grandsons and 2 granddaughters), and 4 wives. They either died in prison in Lanzhou, Gansu, or were killed by the Chinese. His sons Yima Kuli, K'ati Kuli, Maiti Kuli, and grandson Aisan Ahung were the only survivors in 1879. They were all underage children, and put on trial, sentenced to an agonizing death if they were complicit in their father's rebellious "sedition", or if they were innocent of their fathers crimes, were to be sentenced to castration and serving as a eunuch slave to Chinese troops, when they reached 11 years old, and handed over to the Imperial Household to be executed or castrated. In 1879, it was confirmed that the sentence of castration was carried out, Yaqub Beg's son and grandsons were castrated by the Chinese court in 1879 and turned into eunuchs to work in the Imperial Palace. The last remaining Imperial eunuch, Sun Yaoting died in 1996.

Korea

The eunuchs of Korea, called Naesi (내시, 內侍), were officials to the king and other royalty in traditional Korean society. The first recorded appearance of a Korean eunuch was in Goryeosa ("History of Goryeo"), a compilation about the Goryeo period. In 1392, with the founding of the Joseon Dynasty, the Naesi system was revised, and the department was renamed the "Department of Naesi" (내시부, 內侍府).

The Naesi system included two ranks, those of Sangseon (상선, 尙膳, "Chief of Naesi"), who held the official title of senior second rank, and Naegwan (내관, 內官, "Common official naesi"), both of which held rank as officers. 140 naesi in total served the palace in Joseon Dynasty period. They also took the exam on Confucianism every month. The naesi system was repealed in 1894 following Gabo reform.

According to legend, castration consisted of daubing a boy's genitals with human feces and having a dog bite them off. During the Yuan Dynasty, eunuchs became a desirable commodity for tributes, and dog bites were replaced by more sophisticated surgical techniques.

Vietnam

The Vietnamese adopted the eunuch system and castration techniques from China. Records show that the Vietnamese created eunuchs through castration in a painful procedure by removing the entire genitalia with both penis and testicles being cut off with a sharp knife or metal blade. The procedure was agonizing since the entire penis was cut off. The young man's thighs and abdomen would be tied and others would pin him down on a table. The genitals would be sterilized with pepper water and then cut off. A tube would be then inserted into the urethra to allow urination during healing. Any facial hair such as the beard would fall off and the eunuch's voice would become like a girl's. The eunuchs served as slaves to the Vietnamese palace women in the harem like the consorts, concubines, maids, Queen, and Princesses, doing most of the work. The only man allowed in the Palace was the Emperor, the only others allowed were his women and the eunuchs since they were not able to have sexual relations with the women. The eunuchs were assigned to do work for the palace women like massaging and applying make up to the women and preparing them for sex with the Emperor.

Lý Thường Kiệt was a prominent eunuch general during the Lý Dynasty (1009–1225).

The Trần Dynasty sent Vietnamese boy eunuchs as tribute to Ming Dynasty China several times, in 1383, 1384 and 1385 Nguyen Dao, Nguyen Toan, Tru Ca, and Ngo Tin were among several Vietnamese eunuchs sent to China.

During the Fourth Chinese domination of Vietnam, the Ming Chinese under the Yongle Emperor castrated many young Vietnamese boys, choosing them for their handsomeness and ability, and brought them to Nanjing to serve as eunuchs. Among them were the architect-engineer Nguyễn An and Nguyen Lang (阮浪). Vietnamese were among the many eunuchs of different origins found at Yongle's court. Among the eunuchs in charge of the Capital Battalions of Beijing was Xing An, a Vietnamese.

In the Lê Dynasty the Vietnamese Emperor Lê Thánh Tông was aggressive in his relations with foreign countries including China. A large amount of trade between Guangdong and Vietnam happened during his reign. Early accounts recorded that the Vietnamese captured Chinese whose ships had blown off course and detained them. Young Chinese men were selected by the Vietnamese for castration to become eunuch slaves to the Vietnamese. It has been speculated by modern historians that the Chinese who were captured and castrated by the Vietnamese were involved in trade between China and Vietnam instead of actually being blown off course by the wind and they were punished as part of a crackdown on foreign trade by Vietnam.

Several Malay envoys from the Malacca sultanate were attacked and captured in 1469 by the Lê Dynasty of Annam (Vietnam) as they were returning to Malacca from China. The Vietnamese enslaved and castrated the young from among the captured.

A 1472 entry in the Ming Shilu reported that when some Chinese from Nanhai county escaped back to China after their ship had been blown off course into Vietnam, where they had been forced to serve as soldiers in Vietnam's military. The escapees also reported that they found out up to 100 Chinese men remained captives in Vietnam after they were caught and castrated by the Vietnamese after their ships were blown off course into Vietnam. The Chinese Ministry of Revenue responded by ordering Chinese civilians and soldiers to stop going abroad to foreign countries. China's relations with Vietnam during this period were marked by the punishment of prisoners by castration.

A 1499 entry in the Ming Shilu recorded that 13 Chinese men from Wenchang including a young man named Wu Rui were captured by the Vietnamese after their ship was blown off course while traveling from Hainan to Guangdong's Qin subprefecture (Qinzhou), after which they ended up near the coast of Vietnam, during the Chenghua Emperor's rule (1447–1487). Twelve of them were enslaved to work as agricultural laborers, while the youngest, Wu Rui (吳瑞) was selected for castration since he was the only young man and he became a eunuch attendant at the Vietnamese imperial palace in Thang Long. After years of service, he was promoted at the death of the Vietnamese ruler in 1497 to a military position in northern Vietnam. A soldier told him of an escape route back to China and Wu Rui escaped to Longzhou. The local chief planned to sell him back to the Vietnamese, but Wu was rescued by the Pingxiang magistrate and then was sent to Beijing to work as a eunuch in the palace.

The Đại Việt sử ký toàn thư records that in 1467 in An Bang province of Dai Viet (now Quảng Ninh Province) a Chinese ship blew off course onto the shore. The Chinese were detained and not allowed to return to China as ordered by Le Thanh Tong. This incident may be the same one where Wu Rui was captured.

In the Nguyễn Dynasty the poet Hồ Xuân Hương mocked eunuchs in her poem as a stand-in for criticizing the government.

Commoners were banned from undergoing castration in Vietnam, only adult men of high social rank could be castrated, most eunuchs were born as such with a congenital abnormality. The Vietnamese government mandated that boys born with defective genitalia were to be reported to officials, in exchange for the town being freed from mandatory labor requirements. The boy would have the option of serving as a eunuch official or serving the palace women when he became ten years old. This law was put in place in 1838 during the Nguyễn Dynasty. The only males allowed inside the Forbidden City at Huế were the Emperor and his eunuchs.

The presence of eunuchs in Vietnam was used by the French colonizers to degrade the Vietnamese.

Americas

In 1778, Thomas Jefferson wrote a bill in Virginia reducing the punishment for rape, polygamy or sodomy from death to castration.

Iran

Aqa Mohammad Khan Qajar, who established the Qajar Dynasty in Iran (in the 18th century), was a victim of castration by officers of the previous kingdom. When he conquered Lotf Ali Khan, the last king of the Zand Dynasty, Qajar had Lotf Ali Khan castrated in revenge.

Slave trade

Chief Eunuch of Abdul Hamid II (1912)

In the over 13 centuries of the Arab slave trade in Africa unknown number of Africans were enslaved and shipped to the Middle East. It is claimed that a vast majority of the male black slaves, estimated at around 80%, were castrated. European slaves were also castrated, often by non-Muslims in order to bypass Islamic prohibitions. European "castration centers" existed in Central Europe and other areas beyond Islamic rule, from which eunuchs were then imported.

'The Calipha in Baghdad at the beginning of the 10th Century had 7,000 black eunuchs and 4,000 white eunuchs in his palace." The Arab slave trade typically dealt in the sale of castrated male slaves. Black boys at the age of eight to twelve had their scrotum and penis completely amputated. Around 9 out of 10 bled to death during the procedure, but the high price brought by eunuchs on the market made the practice profitable.

Trafficking of boys for prostitution in modern times

An article in the Gulf Times revealed in 2005 a major sex trade in mostly Nepalese boys who were lured to India and sold to brothels in Mumbai, Hyderabad, New Delhi, Lucknow and Gorakhpur. One victim was lured from Nepal at the age of 14, sold into slavery, locked up, beaten, starved, and forcibly castrated. He reported that he was held in a brothel with 40 to 50 other boys, many of whom were also castrated. He escaped and made his way back to Nepal. Two non-governmental organizations, one that works with homosexuals in Nepal, and one that works to rescue and rehabilitate trafficked women and children, were co-operating to help and rescue these boys.

Preventive measure

"Voluntary" chemical or surgical castration has been in practice in many countries — reports are available from American and European countries in particular for over eighty years (chemical for circa thirty)— as an option for treatment for people who have broken laws of a sexual nature, allowing them to return to the community from otherwise lengthy detentions. The effectiveness and ethics of this treatment are heavily debated.

A temporary "chemical castration" has been studied and developed as a preventive measure and punishment for several repeated sex crimes, such as rape or other sexually related violence. Such a procedure was used on Alan Turing.

In modern times, the Czech Republic practices surgically castrating convicted sex offenders. According to the reports compiled by Council of Europe, a human-rights forum, the central European country physically castrated at least 94 prisoners in the 10 years up to April 2008. The Czech Republic defends this procedure as voluntary and effective. According to Dr. Martin Hollý, director of the Psychiatric Hospital Bohnice in Prague, none of the nearly 100 sex offenders who had been physically castrated had committed further offences. One serial offender stated that being castrated was the "best decision" he ever made: "On the one hand you have to protect the potential victims and on the other hand I wanted to be protected from myself, I wanted to live like a normal person." Don Grubin, a professor at Newcastle University's Institute of Neuroscience who also runs a chemical castration program backed by the U.K.'s Ministry of Justice, was initially opposed to physical castration. After visiting the Czech Republic, however, he agreed that some form of castration might be of benefit to some sex offenders.

Music

In Europe, when women were not permitted to sing in church or cathedral choirs in the Roman Catholic Church, boys were castrated to prevent their voices breaking at puberty and to develop a special high voice. The first documents mentioning castrati are Italian church records from the 1550s. In the baroque and classical music eras these singers were highly appreciated by opera composers as well. Mozart's Exultate Jubilate, Allegri's Miserere and other famous pieces from this period now sung by sopranos and countertenors were written for castrati. Some of the alto parts of Handel's Messiah were first sung by a castrato. Famous castrati include Farinelli, Senesino, Carestini, and Caffarelli. The last castrato was Alessandro Moreschi (1858–1922) who served in the Sistine Chapel Choir. It was not until the late 19th century that the Roman Catholic Church officially condemned the production of castrati.

Religion

A number of religions have included castration as a central theme of their practice. These include:

• The cult of Cybele, in which devotees castrated themselves in ecstatic emulation of Attis: see Gallus.
• Skoptsy
• The Valesians.

Hinduism

• In South Asia, many hijras live in well-defined, organized, all-hijra communities, led by a guru. The power of the hijras as a sexually ambiguous category can only be understood in the religious context of Hinduism. In a few belief of Hinduism, ritual, and art, the power of the combined man/woman, or androgyne, is a frequent and significant theme. Bahuchara Mata, the main object of hijra veneration, is specifically associated with transvestism and transgenderism.

Christianity

While castration is not a major part of Christianity, Jesus himself acknowledged in a discussion about avoiding adultery and divorce that some are involuntarily castrated or born that way, while some others "make themselves eunuchs" willingly out of a desire to be chaste Matthew 19:1–12. Given Jesus' frequent use of metaphor and hyperbole, e.g. Luke 9:62, the church has broadly discouraged any understanding of this passage as recommending literal "self-castration". That is consistent with Jesus' claims (as a rabbi) to uphold the Law given to Moses, e.g. Matthew 5:17, a Law which also discouraged literal castration Deut 23:1. However, in his own comments Jesus had no condemnation for any of the above. In Acts 8:34–8:39, a eunuch is baptized by Philip the Evangelist, demonstrating acceptance of castrated individuals in his church.

The first canon of the First Council of Nicaea in 325 AD forbid clergy members to voluntarily castrate themselves "when in perfect health", but freely accepted those who had been either castrated by others against their will, castrated due to a medical sickness or necessity, or those born as eunuchs.

Paul, arguing against circumcision in Galations 5:12, says As for those agitators, I wish they would go the whole way and emasculate themselves!(NIV)

Well-known Christian eunuchs (or alleged eunuchs) include:

• Origen, who is reported by Eusebius to have castrated himself based on his reading of the Gospel of Matthew 19:12 and other passages in Matthew and Mark that appear to endorse voluntary amputation to avoid sin, although there is some doubt concerning this story. Schaff considers the account genuine but cites Baur et al. in opposition. Origen argues against such literal interpretations of the passages from Matthew and Mark in his First Principles.
• Bishop Melito of Sardis (d. ca 180), who was a eunuch, according to the church history of Eusebius of Caesarea, though, significantly the word "virgin" was substituted in Rufinus' Latin translation of Eusebius.
• Boston Corbett, who was inspired by this same verse 19:12 to castrate himself (Corbett was the 19th-century American soldier who is generally believed to have fired the shot that killed John Wilkes Booth).

Judaism

Judaism forbids the castration of either humans or animals. But while Deuteronomy 23:1 expels castrated men from the assembly of Israel, Isaiah 56:3–5 lovingly encourages eunuchs who follow after God's laws.

According to Rashi, Kham castrated his father Noah.

In Judaism, castrated animals are deemed unfit for sacrifice in the Temple (Lev 22:24). Castrated members of the priestly caste are forbidden to enter certain parts of the temple, to approach the altar, or to make sacrifices, although they could eat their share of the offerings (Lev. 21:16–24).

Others

• Heaven's Gate

Medical consequences

See also: Neutering - Health and behavioral effects

A subject of castration who is altered before the onset of puberty will retain a high voice, non-muscular build, and small genitals. He may well be taller than average, as the production of sex hormones in puberty — more specifically, estrogen via aromatization of testosterone — stops long bone growth. The person may not develop pubic hair and will have a small sex drive or none at all.

Castrations after the onset of puberty will typically reduce the sex drive considerably or eliminate it altogether. Castrated people are automatically sterile, because the testes (for males) and ovaries (for females) produce sex cells needed for sexual reproduction. Once removed the subject is infertile. The voice does not change. Some castrates report mood changes, such as depression or a more serene outlook on life, although this might not be due to chemical changes but instead emotional changes due to the implications of the procedure. Body strength and muscle mass can decrease somewhat. Body hair may sometimes decrease. Castration prevents male pattern baldness if it is done before hair is lost. However, castration will not restore hair growth after hair has already been lost due to male pattern baldness.

Historically, many eunuchs who additionally underwent a penectomy reportedly suffered from urinary incontinence associated with the removal of the penis.

Without hormone replacement therapy (HRT), typical symptoms (similar to those experienced by menopausal women) include hot flashes, gradual bone-density loss resulting in osteopenia or osteoporosis, and potential weight gain or redistribution of body fat to the hips/chest. Replacement of testosterone in the form of gel, patches, or injections can largely reverse these effects, although breast enlargement has also been reported as a possible side effect of testosterone usage.

A study conducted at a mental institution in Kansas, where a large number of male inmates had been castrated, found that the eunuchs lived an average of 14 years longer than the uncastrated men. A similar study of historical eunuchs in Korea's royal court found a 14 to 19 year increase in lifespan compared to intact men of similar socioeconomic background; these eunuchs had a centenarian rate of over 3%.

Psychoanalysis and literary theory

The concept of castration plays an important role in psychoanalysis; see, for example, castration anxiety.

Castration (as a metaphor) also plays an important role in psychoanalytically-influenced literary theory, for example Harold Bloom's The Anxiety of Influence.

In Mexican thriller La Casa del Pelícano, castration is shown as being connected to the Oedipus complex.

Chemical castration

Main article: Chemical castration

In the case of chemical castration, ongoing regular injections of anti-androgens are required. Chemical castration does not actually remove the testicles or ovaries of the subject, nor is it a form of sterilization.

Chemical castration seems to have a greater effect on bone density than physical castration. Since the development of teriparatide, this severe bone loss has been able to be reversed in nearly every case. At this time there is a limitation on the use of this medication to 24 months until the long-term use is better evaluated.

With the advent of chemical castration, physical castration is not generally recommended by the medical community unless medically necessary or desired, though some have undergone the procedure voluntarily.

Animals

See also: Neutering

A gelding being performed on a horse under ketamine anaesthesia.

Humans commonly castrate domestic animals not intended for breeding. Domestic animals are usually castrated to avoid unwanted or uncontrolled reproduction; to reduce or prevent other manifestations of sexual behaviour such as defending the herd from humans and other threats, or intra-herd aggression (e.g. fighting between groups of entire (uncastrated) males of a species); or to reduce other consequences of sexual behavior that may make animal husbandry more difficult, such as boundary/fence/enclosure destruction when attempting to get to nearby females of the species.

Male horses are usually castrated (gelded) using emasculators, because stallions are rather aggressive and troublesome. The same applies to male mules, although they are sterile. Male cattle are castrated to improve fattening and docility in feedlots or for use as oxen. Breeding individuals are kept entire and used for breeding: they may fetch higher prices when sold.

Livestock may be castrated when used for food to increase growth or weight or both of individual male animals and because of the undesirable taste and odor of the meat from sexually mature males. In domestic pigs the taint, called boar taint, is caused by androstenone and skatole concentrations stored in the fat tissues of the animal after sexual maturity. Boar taint is only found in a small minority of pigs and can be controlled through breeding selection, diet and management. It is released when the fat is heated and has a distinct odor and flavor that is widely considered unpalatable to consumers. Consequently, in commercial meat production, male pigs are either castrated shortly after birth or slaughtered before they reach sexual maturity. Recent research in Brazil has shown that castration of pigs is unnecessary because most pigs do not have the 'boar taint'. This is due to many breeds of pigs simply not having the heredity for the boar taint and the fact that pigs are normally slaughtered at a young market weight.

In the case of pets, castration is usually called neutering, and is encouraged to prevent overpopulation of the community by unwanted animals, and to reduce certain diseases such as prostate disease and testicular cancer in male dogs (oophorectomy in female pets is often called spaying). Testicular cancer is rare in dogs, but prostate problems are somewhat common in unaltered male dogs when they get older. Neutered individuals have a much lower risk of developing prostate problems in comparison. Unaltered male cats are more likely to develop an obstruction in their urethra, preventing them from urinating to some degree; however, neutering does not seem to make much difference statistically because many neutered toms also have the problem. A specialized vocabulary has arisen for neutered animals of given species:

• Barrow (pig)
• Bullock (cattle)
• Capon (chicken)
• Gelding (horse)
• Gib (cat, ferret)
• Ox (cattle) (Castration performed on mature adult)
• Stag (cattle, sheep)
• Steer (cattle) (Castration performed on young calf)
• Wether (sheep, goat)

An incompletely castrated male in livestock species (horse and cattle) is known as a rig.

The term stag is used for a male animal castrated after the secondary sex characteristics have developed to such a point as to give him the appearance of sexual maturity.

Rubber rings and pliers used in elastration

Methods of veterinary castration include instant surgical removal, the use of an elastrator tool to secure a band around the testicles that disrupts the blood supply, the use of a Burdizzo tool or emasculators to crush the spermatic cords and disrupt the blood supply, pharmacological injections and implants and immunological techniques to inoculate the animal against his own sexual hormones.

Certain animals, like horses and swine, are usually surgically treated with a scrotal castration (which can be done with the animal standing while sedated and after local anesthetic has been applied), while others, like dogs and cats, are anesthetised and recumbent when surgically castrated with a pre-scrotal incision in the case of dogs, or a pre-scrotal or scrotal incision used for cats.

In veterinary practice an "open" castration refers to a castration in which the inguinal tunic is incised and not sutured. A "closed" castration refers to when the procedure is performed so that the inguinal tunic is sutured together after incision.

Parasitic infection

Main article: Parasitic castration

Some parasitic nematodes chemically castrate their hosts. For example, Microphallus pseudopygmaeus chemically castrates its host, the snail Onoba aculeus, and causes it to grow larger than normal.

See also

• Ashley Treatment
• Birth control
• Castration anxiety
• Castrato, a castrated male singer
• Chemical castration
• Emasculation
• Emasculator
• Eunuch
• Gelding
• Inguinal orchiectomy, the approach typically used to treat testicular cancer
• List of transgender-related topics
• Mad Butcher of Kingsbury Run, a serial killer who castrated his male victims
• Neuticles
• Penectomy
• Penis removal
• Spaying and neutering (for animals)

References

Bibliography

• Bauer, Susan Wise (2010). The History of the Medieval World: From the Conversion of Constantine to the First Crusade (illustrated ed.). W. W. Norton & Company. ISBN 0393078175. Retrieved 6 September 2013. 
• Cooke, Nola; Li, Tana; Anderson, James, eds. (2011). The Tongking Gulf Through History (illustrated ed.). University of Pennsylvania Press. ISBN 0812243366. Retrieved 4 January 2013. 
• Keay, John (2010). China: A History. HarperCollins UK. ISBN 0007372086. Retrieved 6 September 2013. 
• Lary, Diana (2007). Diana Lary, ed. The Chinese State at the Borders (illustrated ed.). UBC Press. ISBN 0774813334. Retrieved 4 January 2013. 
• McMahon, Keith (2013). Women Shall Not Rule: Imperial Wives and Concubines in China from Han to Liao. Rowman & Littlefield Publishers. ISBN 1442222905. Retrieved 6 September 2013. 
• Peterson, Barbara Bennett, ed. (2000). Notable Women of China: Shang Dynasty to the Early Twentieth Century (illustrated ed.). M.E. Sharpe. ISBN 0765619296. Retrieved 6 September 2013. 
• Tsai, Shih-Shan Henry (1996). The Eunuchs in the Ming Dynasty (Ming Tai Huan Kuan) (illustrated ed.). SUNY Press. ISBN 0791426874. Retrieved 5 January 2013. 
• Tuotuo. Liaoshi [History of Liao]. Beijing: Zhonghua shuju, 1974 (or Tuotuo, Liaoshi (Beijing: Zhonghua shuju, 1974))
• Toqto'a; et al. (1344). Liao Shi (宋史) [History of Liao] (in Chinese). 
• Van Derven, H. J., ed. (2000). Warfare in Chinese History. Volume 47 of Sinica Leidensia / Sinica Leidensia (illustrated ed.). BRILL. ISBN 9004117741. Retrieved 6 September 2013. 
• Wade, Geoff (2005), Southeast Asia in the Ming Shi-lu: an open access resource, Asia Research Institute and the Singapore E-Press, National University of Singapore, retrieved 6 September 2013 
• Wang, Yuan-Kang (2013). Harmony and War: Confucian Culture and Chinese Power Politics (illustrated ed.). Columbia University Press. ISBN 0231522401. Retrieved 6 September 2013. 
• Patrick Barbier, The World of the Castrati: the History of an Extraordinary Operatic Phenomenon Souvenir, 1996, ISBN 0-285-63309-0
• Susan Elliott, Cutting Too Close for Comfort: Paul's Letter to the Galatians in Its Anatolian Cultic Context Reviews in Review of Biblical Literature
• Travis Nygard and Alec Sonsteby. "Castration." In The Cultural Encyclopedia of the Body, edited by Victoria Pitts, pages 502–507. Westport, CT: Greenwood Press, 2008.
• Theresa McCuaig, "Understanding Castration." 2009.
• 祝建龙 (Zhu Jianlong) (April 2009). 辽代后宫制度研究 [Research on the System of Imperial Harem in the Liao Dynasty] (Master's) (in Chinese). 吉林大学 (Jilin University). Retrieved 4 October 2013. 
• English language Abstracts of the thesis
  • • Research on the System of Imperial Harem in Liao Dynasty
    • Research on the System of Imperial Harem in Liao Dynasty
    • Research on the System of Imperial Harem in Liao Dynasty

External links

• Castration Through the Ages
• The Journal of Clinical Endrocrinology and Metabolism
• Neutering NOT Org Website arguing against the castration of domestic animals
• Boar taint in pigs selected for components of efficient lean growth rate

UpToDate Contents

全文を閲覧するには購読必要です。 To read the full text you will need to subscribe.

• 1. アンドロゲン受容体障害の診断および治療diagnosis and treatment of disorders of the androgen receptor [show details]
  …Therefore, gonadectomy in women with delayed until sexual maturation is complete. This approach also respects patient autonomy . However, in some situations, the convenience of combining gonadectomy with hernia …
• 2. 卵巣摘出術および卵巣嚢腫核出術oophorectomy and ovarian cystectomy [show details]
  …malignancy, and location of disease. Male pseudohermaphrodites, in whom the procedure is termed "gonadectomy" – An increased risk of gonadal malignancy occurs in phenotypic females with a Y chromosome in …
• 3. 男性における原発性性腺機能低下の原因causes of primary hypogonadism in males [show details]
  …testis ("mixed gonadal dysgenesis"), the risk of gonadoblastoma is approximately 20 percent . Gonadectomy should therefore be performed in these patients. The 47,XYY karyotype was initially thought to…
• 4. 卵巣胚細胞腫瘍：病理学、臨床症状、および診断ovarian germ cell tumors pathology clinical manifestations and diagnosis [show details]
• 5. アンドロゲン不応症の発症機序と臨床的特徴pathogenesis and clinical features of disorders of androgen action [show details]
  …early prophylactic gonadectomy is not recommended at this time. However, there is a risk of increasing tumor formation with age, so that patients should be followed closely and gonadectomy be performed postpubertally …

English Journal

• Bone in trans persons.

• Van Caenegem E1, TʼSjoen G.
• Current opinion in endocrinology, diabetes, and obesity.Curr Opin Endocrinol Diabetes Obes.2015 Dec;22(6):459-66. doi: 10.1097/MED.0000000000000202.
• PURPOSE OF REVIEW: We provide an update of bone health in trans persons on cross-sex hormonal therapy. This drastic hormonal reversal will have direct but also indirect effects on bone, through body composition changes.RECENT FINDINGS: Recent evidence suggests that trans women, even before the start
• PMID 26512771

• Dependence of cytokine levels on the sex of experimental animals: a pilot study on the effect of oestrogen in the temporomandibular joint synovial tissues.

• Figueroba SR1, Franco GC2, Omar NF3, Groppo MF3, Groppo FC4.
• International journal of oral and maxillofacial surgery.Int J Oral Maxillofac Surg.2015 Nov;44(11):1368-75. doi: 10.1016/j.ijom.2015.06.025. Epub 2015 Jul 17.
• The aim of this study was to evaluate the effects of 17β-oestradiol (E2) on cartilage thickness and cytokine levels in the temporomandibular joint (TMJ). Thirty rats (15 female, 15 male) were orchidectomized (ORX), ovariectomized (OVX), or sham-operated. After 21 days, animals were assigned to six
• PMID 26194775

• Steroid receptor coactivator-1 mediates letrozole induced downregulation of postsynaptic protein PSD-95 in the hippocampus of adult female rats.

• Liu M1, Huangfu X1, Zhao Y2, Zhang D3, Zhang J4.
• The Journal of steroid biochemistry and molecular biology.J Steroid Biochem Mol Biol.2015 Nov;154:168-75. doi: 10.1016/j.jsbmb.2015.07.011. Epub 2015 Jul 26.
• Hippocampus local estrogen which is converted from androgen that catalyzed by aromatase has been shown to play important roles in the regulation of learning and memory as well as cognition through action on synaptic plasticity, but the underlying mechanisms are poorly understood. Steroid receptor co
• PMID 26223010

Japanese Journal

• 症例報告 腎移植術前検査で確定診断され予防的に性腺摘除を行ったFrasier症候群の1例

• 浅野 達雄,神田 祥一郎,秋岡 祐子 [他]
• 日本小児科学会雑誌 = The journal of the Japan Pediatric Society 118(10), 1515-1519, 2014-10
• NAID 40020243328

• Tumors of Bilateral Streak Gonads in Patients with Disorders of Sex Development Containing Y Chromosome Material

• Matsumoto Fumi,Shimada Kenji,Ida Shinobu
• Clinical Pediatric Endocrinology 23(3), 93-97, 2014
• … Therefore, gonadectomy is recommended in females with bilateral streak gonads and Y chromosome material. … The aim of this study was to present our experience with prophylactic gonadectomy in those patients and evaluate their risk of gonadal tumors. … We reviewed the charts of 11 female patients who had bilateral gonadectomy (by laparoscopically in 9 patients, by laparotomy in 2 patients) between 1991 and 2012 at our hospital. …
• NAID 130004677664

• 性分化疾患治療における腹腔鏡の有用性

• 守屋 仁彦,森田 研,三井 貴彦,橘田 岳也,中村 美智子,菅野 由岐子,今 雅史,野々村 克也
• Japanese Journal of Endourology 27(1), 169-173, 2014
• 　【目的】性分化疾患治療における腹腔鏡の有用性について検討した．　【対象及び方法】1992年4月から2012年12月までの間に当科で経験した性分化疾患症例19例に対する治療的腹腔鏡手術を，手術手技・合併症を中心に後方視的に解析した．　【結果】手術手技は性腺摘除術18例（両側13例，片側3例，部分切除2例），子宮摘除術2例，精巣固定術1例，S状結腸利用膣形成術1例であった．いずれの手術でも臍部以下に …
• NAID 130004627238

Related Links

• Gonadectomy | Definition of Gonadectomy by Merriam-Webster

:surgical removal of an ovary or testis ... Seen and Heard What made you want to look up gonadectomy? Please tell us where you read or heard it (including the quote, if possible).

• Gonadectomy | definition of gonadectomy by Medical dictionary

gonadectomy [go″nah-dek´to-me] surgical removal of a gonad. go·nad·ec·to·my (gō'nad-ek'tŏ-mē), Excision of ovary or testis. See also: castration, orchiectomy, ovariectomy. [gonado- + G. ektomē, excision] gonadectomy /go·nad·ec ...

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リンク元	「gonadectomized」「neuter」「emasculate」「castrate」「emasculated」

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「neuter」

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「emasculate」

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「castrate」

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関

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「emasculated」

　　[★]

• 去勢された

関

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