Prevalence of circumcision
The prevalence of circumcision is the percentage of males in a given population who have been circumcised. The rates vary widely by country, from virtually 0% in Honduras and Japan, to 3.8% in the United Kingdom, to 7% in Spain, to 45% in South Africa, to 82.5% in the United States, to over 90% in many Muslim-majority countries. In 2007, the World Health Organization (WHO) estimated 33% of adult males worldwide (aged 15+) are circumcised, with about two-thirds of those being Muslims.
Male circumcision is nearly universal in the Muslim world and in Israel due to the religious beliefs of the majority of Muslims and Jews; however, some non-Muslim groups living within Muslim-majority countries, such as Armenians and Assyrians, do not practise it. It is prevalent in some Muslim-majority countries in southeast Asia such as Indonesia and Malaysia; however, the WHO states that there is "little non-religious circumcision in Asia, with the exceptions of the Republic of Korea and the Philippines". In parts of Africa it is often practised as part of tribal or religious customs. The prevalence of circumcision used to be high in the United States, although there has been a major decrease in routine neonatal circumcision in recent years.
Australia, Canada, Ireland, New Zealand and the United Kingdom are examples of countries that have seen a decline in male circumcision in recent decades, while there have been indications of increasing demand in southern Africa, partly for preventive reasons due to the HIV epidemic there.
- 1 Africa
- 2 Americas
- 3 Asia
- 4 Europe
- 5 Oceania
- 6 See also
- 7 References
- 8 External links
Studies indicate that about 62% of African males are circumcised. However, the rate varies widely between different regions, and among ethnic and religious groups, with Muslim North Africans practising it for religious reasons, central Africans as part of tribal rituals or local custom, (with some practising female genital mutilation as well) and some traditionally non-circumcising populations in the South recently adopting the practice due to measures by the World Health Organisation to prevent AIDS. Williams, B.G. et al. commented that: "Most of the currently available data on the prevalence of [male circumcision] are several decades old, while several of the recent studies were carried out as adjuncts to demographic and health surveys and were not designed to determine the prevalence of [male circumcision]."
Less than 20%
Between 20% and 80%
It is estimated that 44.7% of males are circumcised in South Africa. One national study reported that 48.2% of black Africans were circumcised, with 32.1% of those traditionally circumcised and 13.4% circumcised for medical reasons.
More than 80%
Benin, Burkina Faso, Cameroon, Congo (Dem Rep), Cote d’Ivoire, Djibouti, Equatorial Guinea, Eritrea, Ethiopia, Gabon, Gambia, Ghana, Guinea, Guinea-Bissau, Kenya, Liberia, Mali, Mauritania, Niger, Nigeria, Senegal, Sierra Leone, Somalia, Togo.
Less than 20%
Less than 20% of the population are circumcized in Argentina, Belize, Bolivia, Brazil, Chile, Colombia, Costa Rica, Cuba, Dominican Republic, El Salvador, Ecuador, French Guiana, Guatemala, Guyana, Haiti, Honduras, Jamaica, Mexico, Nicaragua, Panama, Paraguay, Peru, Puerto Rico, Saint Lucia, The Bahamas, Trinidad and Tobago, Uruguay, Venezuela.
The overall prevalence of circumcision is reported to be 6.9% in Colombia, and 7.4% in Brazil (13% in Rio de Janeiro), with most of those being done due to medical issues later in life.
The prevalence of circumcision in Mexico is estimated to be 10% to 31%.
Between 20% and 80%
Circumcision in Canada followed the pattern of other English speaking countries, with the practice being adopted during the 1900s, to prevent masturbation and other perceived issues of the time, but with the rate of circumcision declining in the latter part of the 20th century, particularly after a new policy position was released in 1975. The Canadian Paediatric Society estimated that, in 1970, 48 percent of males were circumcised. However, studies conducted in 1977-1978 revealed a wide variation in the incidence of circumcision between different provinces and territories. For example, Yukon reported a rate of 74.8 percent, while Newfoundland reported an incidence of 1.9 to 2.4 percent. The rate continued to drop, with the newborn circumcision rate in Ontario in 1994-95 dropping to 29.9%.
A survey of Canadian maternity practices conducted in 2006/2007, and published in 2009 by the national public health agency, found a newborn circumcision rate of 31.9%. Rates varied markedly across the country, from close to zero in Newfoundland and Labrador to 44.3% in Alberta. In 2015, the Canadian Paediatric Society used those statistics in determining the national circumcision rate it currently quotes.
|Newfoundland and Labrador||*|
|Prince Edward Island||39.2|
|* Numerator too small for rate calculation|
|Source: Canadian Maternity Experiences Survey|
The Centers For Disease Control and Prevention (CDC) uses two data sources to track circumcision rates. The first is the National Health and Nutrition Examination Survey (NHANES), which records circumcisions performed at any time at any location. The second is the National Hospital Discharge Survey (NHDS), which does not record circumcisions performed outside the hospital setting or those performed at any age following discharge from the birth hospitalization.
A HCUP statistical brief reported in February 2012 that circumcisions had dropped from around 60% in 2000 to 54.5% in 2009. In 2010, the CDC reported a steep decline in circumcision rates of newborns, from 56% in 2007 to just over 30% in 2009.
Medicaid funding for infant circumcision used to be available in every state, but starting with California in 1982, 18 states (Arizona, California, Colorado, Florida, Idaho, Louisiana, Maine, Minnesota, Mississippi, Missouri, Montana, Nevada, North Carolina, North Dakota, Oregon, South Carolina, Utah, and Washington) had eliminated Medicaid coverage of routine (non-therapeutic) circumcision by July 2011. One study in the Midwest of the U.S. found that this had no effect on the newborn circumcision rate but it did affect the demand for circumcision at a later time. Another study, published in early 2009, found a difference in the neonatal male circumcision rate of 24% between states with and without Medicaid coverage. The study was controlled for other factors such as the percentage of Hispanic patients. Other studies have shown that the rise of immigrants from East Asia, Southeast Asian, South Asia and Hispanic South American countries are a large factor in why the rates continue to drop in the US.
Circumcision was the second-most common procedure performed on patients under one year of age. There are various explanations for why the infant circumcision rate in the United States is different from comparable countries. Many parents’ decisions about circumcision are preconceived, which may contribute to the high rate of elective circumcision. Brown & Brown (1987) reported the most important factor is whether the father is circumcised.
Less than 20%
The overall prevalence of circumcision in Cambodia is reported to be 3.5%.
The overall prevalence of circumcision in China is reported to be 14%.
Between 60% and 80%
Indonesia, Kazakhstan, Malaysia, and South Korea.
Circumcision is largely a modern-day phenomenon in South Korea. While the rate in the twentieth century has been nearing 80%, virtually no circumcision was performed just a century ago, as it was against Korea's long and strong tradition of preserving the body as a gift from parents. A 2001 study of 20-year-old South Korean men found that 78% were circumcised. At the time, the authors commented that "South Korea has possibly the largest absolute number of teenage or adult circumcisions anywhere in the world. Because circumcision started through contact with the American military during the Korean War, South Korea has an unusual history of circumcision." According to a 2002 study, 86.3% of South Korean males aged 14–29 were circumcised. In 2012, it's the case of 75.8% of the same age group. Only after 1999 has some information against circumcision become available (at the time of the 2012 study, only 3% of Korean internet sites, using the most popular Korean search engine Naver, are against indiscriminate circumcision and 97% are for). The authors of the study speculate "that the very existence of information about the history of Korean circumcision, its contrary nature relative to a longstanding tradition, its introduction by the US military, etc., has been extremely influential on the decision-making process regarding circumcision."
More than 80%
Afghanistan, Bahrain, Brunei, Iran, Iraq, Israel, Pakistan, Jordan, Kuwait, Kyrgyzstan, Lebanon, Oman, Palestine, the Philippines, Qatar, Saudi Arabia, Syria, Tajikistan, Turkmenistan, Uzbekistan, United Arab Emirates and Yemen.
Less than 20%
Armenia, Austria, Belarus, Belgium, Bulgaria, Croatia, Czech Republic, Cyprus, Denmark, Estonia, Finland, France, Georgia, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Moldova, The Netherlands, Norway, Poland, Portugal, Romania, Russia, Slovakia, Slovenia, Spain, Serbia, Sweden, Switzerland, Ukraine, and the United Kingdom.
A national survey on sexual attitudes in 2000 found that 15.8% of men or boys in the United Kingdom (ages 16–44) were circumcised by their parents' choosing. 11.7% of 16- to 19-year-olds, and 19.6% of 40- to 44-year-olds said they had been circumcised. Apart from black Caribbeans, men born overseas were more likely to be circumcised. Rickwood et al. reported that the proportion of English boys circumcised for medical reasons had fallen from 35% in the early 1930s to 6.5% by the mid-1980s. An estimated 3.8% of male children in the UK in 2000 were being circumcised by the age of 15. The researchers stated that too many boys, especially under the age of 5, were still being circumcised because of a misdiagnosis of phimosis. They called for a target to reduce the percentage to 2%.
In Finland, the overall prevalence of circumcision is 2-4%, according to a recent publication by the Finnish Health Ministry.
In Germany, the German Health Interview and Examination Survey for Children and Adolescents found that 10.9% of boys aged 0–17 had been circumcised.
In France, according to a telephone survey (TNS Sofres Institute, 2008), 14% of men are circumcised.
The overall prevalence of circumcision in Spain is reported to be 6.6%.
In 1986, 511 out of approximately 478,000 Danish boys aged 0–14 years were circumcised. This corresponds to a cumulative national circumcision rate of around 1.6% by the age of 15 years.
In Slovenia, a 1999-2001 national probability sample of the general population aged 18–49 years found that overall, 4.5% of Slovenian male citizens reported being circumcised. Prevalence strongly varied across religious groups, with 92.4% of Muslims being circumcised, 1.7% of Roman Catholics, 0% of other religious affiliations (Evangelic, Serbian Orthodox, other), and 7.1% of those with no religious affiliation.
Between 20% and 80%
Albania, Kosovo, North Macedonia, and Bosnia and Herzegovina.
In Albania during the years 2008-09 the percentage of men age 15-49 who reported having been circumcised was 47.7%. In the years 2017-18 the circumcision rate in Albania had declined to 36.8% 
More than 80%
Azerbaijan and Turkey
Andorra, Croatia and Luxembourg are listed as unknown on the WHO prevalence map. Liechtenstein, Malta, Monaco, San Marino and Vatican City are unclear from the map.
Circumcision reached its peak in Australia in the 1950s with a rate of more than 80%, but has steadily fallen to an estimated 26% in 2012. The rate of circumcision has dropped rapidly over the years. It is estimated that roughly 80 percent of males 35 and under are intact. Circumcision rates have declined drastically in recent years as young fathers are starting to have children of their own and leaving them intact.
The Australian Longitudinal Study of Health and Relationships is a computer assisted telephone interview of males aged 16–64 that uses a nationally representative population sample. In 2005 the interview found that the prevalence of circumcision in Australia was roughly 58%. Circumcision status was more common with males over 30 than males under 30, and more common with males who were born in Australia. 66% of males born in Australia were circumcised and less than 1/3 of males under 30 were circumcised. There has been a decline in the rate of infant circumcision in Australia. The Royal Australasian College of Physicians (RACP) estimated in 2010 that 10 to 20 percent of newborn boys are being circumcised, but the prevalence of male circumcision is much higher due to the presence of older circumcised males remaining in the population. Medicare Australia records show the number of males younger than six months that underwent circumcision dropped from 19,663 in 2007/08 to 6309 (4%) in 2016/17.
According to the World Health Organisation, fewer than 20% of males are circumcised in New Zealand in 2007. In New Zealand routine circumcision for which there is no medical indication is uncommon and no longer publicly funded within the public hospital system. In a study of men born in 1972–1973 in Dunedin, 40.2% were circumcised. In a study of men born in 1977 in Christchurch, 26.1% were circumcised. A 1991 survey conducted in Waikato found that 7% of male infants were circumcised.
- Male circumcision rates of 237 countries around the world
- Male circumcision
- Genital modification
- Prevalence of female genital cutting
- "Male circumcision: Global trends and determinants of prevalence, safety and acceptability" (PDF). World Health Organization. 2007.
- "Male circumcision: Global trends and determinants of prevalence, safety and acceptability" (PDF). World Health Organization. 2007. Retrieved 4 March 2009.
- "Neonatal and child male circumcision: a global review" (PDF). World Health Organization. 2010. Retrieved 12 April 2015.
- Morris BJ, Wamai RG, Henebeng EB, Tobian AA, Klausner JD, Banerjee J, Hankins CA (1 March 2016). "Estimation of country-specific and global prevalence of male circumcision". Population Health Metrics. 14 (1): 4. doi:10.1186/s12963-016-0073-5. PMC 4772313. PMID 26933388.
- Vardanyan, Astrik N (2013). "Reclaiming Circumcision: Armenian Stories". Genital Cutting: Protecting Children from Medical, Cultural, and Religious Infringements. pp. 307–315. doi:10.1007/978-94-007-6407-1_20. ISBN 978-94-007-6406-4.
- The Centers For Disease Control and Prevention, Division of Health Care Statistics. "Trends in Circumcision for Male Newborns in U.S. Hospitals: 1979-2010" (PDF).
- Drain PK, Halperin DT, Hughes JP, Klausner JD, Bailey RC (November 2006). "Male circumcision, religion, and infectious diseases: an ecologic analysis of 118 developing countries". BMC Infectious Diseases. 6 (1): 172. doi:10.1186/1471-2334-6-172. PMC 1764746. PMID 17137513.
- Wise J (July 2006). "Demand for male circumcision rises in a bid to prevent HIV" (PDF). Bulletin of the World Health Organization. 84 (7): 509–11. PMC 2627386. PMID 16878217.
As a result, there are already indications of increasing demand for male circumcision in traditionally non-circumcising societies in Southern Africa.
- "Questions and answers: NIAID-sponsored adult male circumcision trials in Kenya and Uganda". National Institute of Allergy and Infectious Diseases. December 2006. Archived from the original on 9 March 2010.
- Williams BG, Lloyd-Smith JO, Gouws E, Hankins C, Getz WM, Hargrove J, de Zoysa I, Dye C, Auvert B (July 2006). "The potential impact of male circumcision on HIV in Sub-Saharan Africa". PLoS Medicine. 3 (7): e262. doi:10.1371/journal.pmed.0030262. PMC 1489185. PMID 16822094.
- "Information package on male circumcision and HIV prevention: insert 2" (PDF). World Health Organisation. p. 2.
- Morris BJ, Wamai RG, Henebeng EB, Tobian AA, Klausner JD, Banerjee J, Hankins CA (1 March 2016). "Estimation of country-specific and global prevalence of male circumcision". Population Health Metrics. 14 (1): 4. doi:10.1186/s12963-016-0073-5. PMID 26933388.
- Morris BJ, Wamai RG, Henebeng EB, Tobian AA, Klausner JD, Banerjee J, Hankins CA (4 April 2016). "Erratum to: Estimation of country-specific and global prevalence of male circumcision". Population Health Metrics. 14 (1): 11. doi:10.1186/s12963-016-0080-6. PMC 4820865. PMID 27051352.
- Peltzer K, Onoya D, Makonko E, Simbayi L (2014). "Prevalence and acceptability of male circumcision in South Africa". African Journal of Traditional, Complementary and Alternative Medicines. 11 (4): 126–30. doi:10.4314/ajtcam.v11i4.19. PMC 4202407. PMID 25392591.
- Castellsagué X, Peeling RW, Franceschi S, de Sanjosé S, Smith JS, Albero G, Díaz M, Herrero R, Muñoz N, Bosch FX (November 2005). "Chlamydia trachomatis infection in female partners of circumcised and uncircumcised adult men". American Journal of Epidemiology. 162 (9): 907–16. doi:10.1093/aje/kwi284. PMID 16177149.
- Van Howe RS, Cold CJ, Lajous M, Lazcano-Ponce E, Mueller N (February 2006). "Human papillomavirus link to circumcision is misleading". Cancer Epidemiology, Biomarkers & Prevention. 15 (2): 405, author reply 405–6. doi:10.1158/1055-9965.EPI-05-0818. PMID 16492939.
Circumcision is not usually performed by public sector health care providers in Mexico and we estimate the prevalence to be 10% to 31%, depending on the population.
- "Data Tables — The Maternity Experiences Survey (MES) 2006–2007 Canadian Maternity Experiences Survey" (PDF). Public Health Agency of Canada. p. 267.
- "Neonatal circumcision revisited. Fetus and Newborn Committee, Canadian Paediatric Society". CMAJ. 154 (6): 769–80. March 1996. PMC 1487803. PMID 8634956. Archived from the original on 23 October 2007.
- Wirth JL (November 1980). "Current circumcision practices: Canada". Pediatrics. 66 (5): 705–8. PMID 7432876.
- Goel, V. (ed.) (May 1996). Patterns of Health Care in Ontario, 2nd edition (PDF). Canadian Medical Association. p. 295. ISBN 978-0-920169-79-7.CS1 maint: Extra text: authors list (link)
- Sorakan ST, Finlay JC, Jefferies AL (2015). "Newborn male circumcision". Paediatr Child Health. 20 (6): 311–5. doi:10.1093/pch/20.6.311. PMC 4578472. PMID 26435672.
- Morris BJ, Bailis SA, Wiswell TE (May 2014). "Circumcision rates in the United States: rising or falling? What effect might the new affirmative pediatric policy statement have?". Mayo Clinic Proceedings. 89 (5): 677–86. doi:10.1016/j.mayocp.2014.01.001. PMID 24702735.
- Maeda, J. (Thomson Reuters), Chari, R. (RAND), and Elixhauser, A. (AHRQ). Circumcisions in U.S. Community Hospitals, 2009. HCUP Statistical Brief #126. February 2012. Agency for Healthcare Research and Quality, Rockville, MD. Available at http://www.hcup-us.ahrq.gov/reports/statbriefs/sb126.pdf
- Rabin, Roni Caryn. "Steep Drop Seen in Circumcisions in U.S." The New York Times. The New York Times. Retrieved 12 December 2018.
- Adler PW (December 2011). "Is it lawful to use Medicaid to pay for circumcision?". Journal of Law and Medicine. 19 (2): 335–53. PMID 22320007.
- Quayle SS, Coplen DE, Austin PF (October 2003). "The effect of health care coverage on circumcision rates among newborns". The Journal of Urology. 170 (4 Pt 2): 1533–6, discussion 1536. doi:10.1097/01.ju.0000091215.99513.0f. PMID 14501653.
Leibowitz AA, Desmond K, Belin T (January 2009). "Determinants and policy implications of male circumcision in the United States". American Journal of Public Health. 99 (1): 138–45. doi:10.2105/AJPH.2008.134403. PMC 2636604. PMID 19008503.
The mean mewborn male circumcision rate was 55.9%. When we controlled for other factors, hospitals in states in which Medicaid covers routine male circumcision had circumcision rates that were 24 percentage points higher than did hospitals in states without such coverage (P < .001).
- Pfuntner A., Wier L.M., Stocks C. Most Frequent Procedures Performed in U.S. Hospitals, 2011. HCUP Statistical Brief #165. October 2013. Agency for Healthcare Research and Quality, Rockville, MD. .
- "Report 10 of the Council on Scientific Affairs (I-99):Neonatal Circumcision". 1999 AMA Interim Meeting: Summaries and Recommendations of Council on Scientific Affairs Reports. American Medical Association. December 1999. p. 17. Archived from the original on 5 July 2007. Retrieved 13 June 2006.CS1 maint: Unfit url (link)
- Brown MS, Brown CA (1987). "Circumcision decision: prominence of social concerns". Pediatrics. 60 (2): 215–9. PMID 3615091.
- Kim D, Koo SA, Pang MG (December 2012). "Decline in male circumcision in South Korea". BMC Public Health. 12: 1067. doi:10.1186/1471-2458-12-1067. PMC 3526493. PMID 23227923.
- Ku JH, Kim ME, Lee NK, Park YH (February 2003). "Circumcision practice patterns in South Korea: community based survey". Sexually Transmitted Infections. 79 (1): 65–7. doi:10.1136/sti.79.1.65. PMC 1744613. PMID 12576619.
- Pang MG, Kim DS (January 2002). "Extraordinarily high rates of male circumcision in South Korea: history and underlying causes". BJU International. 89 (1): 48–54. doi:10.1046/j.1464-410x.2002.02545.x. PMID 11849160.
- "Israel teaches WHO about circumcision". ynet news. November 2006.
- Morris, B. J.; Wamai, R. G.; Henebeng, E. B.; Tobian, A. A.; Klausner, J. D.; Banerjee, J.; Hankins, C. A. (2016). "Estimation of country-specific and global prevalence of male circumcision". Population Health Metrics. 14: 4. doi:10.1186/s12963-016-0073-5. PMC 4772313. PMID 26933388.
- Darby R (August 2011). "Routine peripubertal circumcision?". CMAJ. 183 (11): 1283–4. doi:10.1503/cmaj.111-2060. PMC 3153524. PMID 21825054.
- Ong, Christine (29 May 2008). "Philippine doctors question medical benefits of circumcision". Channel News Asia. MediaCorp. Retrieved 27 August 2012.
- Kamtsiuris P, Bergmann E, Rattay P, Schlaud M (2007). "[Use of medical services. Results of the German Health Interview and Examination Survey for Children and Adolescents (KiGGS)]" [Use of medical services. Results of the German Health Interview and Examination Survey for Children and Adolescents (KiGGS)]. Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz (in German). 50 (5–6): 836–50. doi:10.1007/s00103-007-0247-1. PMID 17514470.
- Dave SS, Fenton KA, Mercer CH, Erens B, Wellings K, Johnson AM (December 2003). "Male circumcision in Britain: findings from a national probability sample survey". Sexually Transmitted Infections. 79 (6): 499–500. doi:10.1136/sti.79.6.499. PMC 1744763. PMID 14663134.
- Rickwood AM, Kenny SE, Donnell SC (September 2000). "Towards evidence based circumcision of English boys: survey of trends in practice". BMJ. 321 (7264): 792–3. doi:10.1136/bmj.321.7264.792. PMC 27490. PMID 11009516.
- Maija K, Taskinen S. "Esinahan kirurgia" (PDF). Retrieved 20 October 2015.
- Telephone survey of the TNS Sofres Institute (commissioned by Manix), 2008 Archived 8 August 2011 at the Wayback Machine.
- Frisch M, Friis S, Kjaer SK, Melbye M (December 1995). "Falling incidence of penis cancer in an uncircumcised population (Denmark 1943-90)". BMJ. 311 (7018): 1471. doi:10.1136/bmj.311.7018.1471. PMC 2543732. PMID 8520335.
- Klavs I, Hamers FF (February 2008). "Male circumcision in Slovenia: results from a national probability sample survey". Sexually Transmitted Infections. 84 (1): 49–50. doi:10.1136/sti.2007.027524. PMID 17881413.
- https://dhsprogram.com/pubs/pdf/FR230/FR230.pdf WHO page 236
- "Albania Demographic and Health Survey (2017-18 ADHS" (PDF). http://www.instat.gov.al. p. 279. External link in
- "Incidence and prevalence of circumcision in Australia". Circumcision Information Australia. January 2013. Retrieved 26 June 2018.
- Smith AM, Pitts MK, Shelley JM, Richters J, Ferris J (July 2007). "The Australian longitudinal study of health and relationships". BMC Public Health. 7: 139. doi:10.1186/1471-2458-7-139. PMC 1931435. PMID 17608953.
- Ferris JA, Richters J, Pitts MK, Shelley JM, Simpson JM, Ryall R, Smith AM (April 2010). "Circumcision in Australia: further evidence on its effects on sexual health and wellbeing". Australian and New Zealand Journal of Public Health. 34 (2): 160–4. doi:10.1111/j.1753-6405.2010.00501.x. PMID 23331360.
- Richters J, Smith AM, de Visser RO, Grulich AE, Rissel CE (August 2006). "Circumcision in Australia: prevalence and effects on sexual health". International Journal of STD & AIDS. 17 (8): 547–54. doi:10.1258/095646206778145730. PMID 16925903.
- "Circumcision of Male Infants". Royal Australasian College of Physicians. 2010.
- The incidence of circumcision in Australia was very high until 1971 when it started a steep decline. Consequently, circumcised males tend to be older.
- Rashida Yosufzai (19 February 2018). "Why is the number of male circumcisions declining in Australia?". SBS News. Retrieved 26 June 2018.
- Afsari M, Beasley SW, Maoate K, Heckert K (March 2002). "Attitudes of Pacific parents to circumcision of boys". Pacific Health Dialog. 9 (1): 29–33. PMID 12737414.
Circumcision for cultural reasons is routine in Pacific Island countries.
- Dickson N, van Roode T, Paul C (August 2005). "Herpes simplex virus type 2 status at age 26 is not related to early circumcision in a birth cohort". Sexually Transmitted Diseases. 32 (8): 517–9. doi:10.1097/01.olq.0000161296.58095.ab. PMID 16041257.
- Fergusson DM, Boden JM, Horwood LJ (November 2006). "Circumcision status and risk of sexually transmitted infection in young adult males: an analysis of a longitudinal birth cohort". Pediatrics. 118 (5): 1971–7. doi:10.1542/peds.2006-1175. PMID 17079568.
- Lawrenson RA (May 1991). "Current practice of neonatal circumcision in the Waikato". The New Zealand Medical Journal. 104 (911): 184–5. PMID 1898442.