{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,11]],"date-time":"2026-03-11T11:18:47Z","timestamp":1773227927536,"version":"3.50.1"},"reference-count":41,"publisher":"Springer Science and Business Media LLC","issue":"1","license":[{"start":{"date-parts":[[2012,9,27]],"date-time":"2012-09-27T00:00:00Z","timestamp":1348704000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/2.0"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["BMC Pregnancy Childbirth"],"published-print":{"date-parts":[[2012,12]]},"DOI":"10.1186\/1471-2393-12-103","type":"journal-article","created":{"date-parts":[[2012,9,27]],"date-time":"2012-09-27T22:13:35Z","timestamp":1348784015000},"source":"Crossref","is-referenced-by-count":53,"title":["Temporal trends in the frequency of twins and higher-order multiple births in Canada and the United States"],"prefix":"10.1186","volume":"12","author":[{"given":"Deshayne B","family":"Fell","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"KS","family":"Joseph","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2012,9,27]]},"reference":[{"key":"586_CR1","volume-title":"Canadian Perinatal Health Report","author":"Public Health Agency of Canada","year":"2008","unstructured":"Public Health Agency of Canada: Canadian Perinatal Health Report. 2008, Ottawa: Minister of Health, Catalogue No HP10-12\/2008E, 2008","edition":"2008"},{"key":"586_CR2","first-page":"1","volume":"60","author":"JA Martin","year":"2011","unstructured":"Martin JA, Hamilton BE, Ventura SJ, Osterman MJK, Kirmeyer S, Mathews TJ, Wilson E, Division of Vital Statistics: Births: final data for 2009, table 27. Natl Vital Stat Rep. 2011, 60: 1-70. http:\/\/www.cdc.gov\/nchs\/data\/nvsr\/nvsr60\/nvsr60_01.pdf . Accessed August 7, 2012","journal-title":"Natl Vital Stat Rep"},{"key":"586_CR3","volume-title":"Three Decades of Twin Births in the United States, 1980-2009","author":"JA Martin","year":"2012","unstructured":"Martin JA, Hamilton BE, Osterman MJK: NCHS data brief, no 80. Three Decades of Twin Births in the United States, 1980-2009. 2012, MD: National Center for Health Statistics, Hyattsville"},{"key":"586_CR4","first-page":"1","volume":"47","author":"JA Martin","year":"1999","unstructured":"Martin JA, Park MM: Trends in twin and triplet births: 1980-97. Natl Vital Stat Rep. 1999, 47: 1-16.","journal-title":"Natl Vital Stat Rep"},{"key":"586_CR5","doi-asserted-by":"publisher","first-page":"380","DOI":"10.1080\/14767058410001727413","volume":"15","author":"CV Ananth","year":"2004","unstructured":"Ananth CV, Joseph KS, Kinzler WL: The influence of obstetric intervention on trends in twin stillbirths: United States, 1989-99. J Matern Fetal Neonatal Med. 2004, 15: 380-387. 10.1080\/14767058410001727413.","journal-title":"J Matern Fetal Neonatal Med"},{"key":"586_CR6","doi-asserted-by":"publisher","first-page":"141","DOI":"10.1046\/j.1365-3016.2002.00413.x","volume":"16","author":"KS Joseph","year":"2002","unstructured":"Joseph KS, Marcoux S, Ohlsson A, Kramer MS, Allen AC, Liu S, Wu Wen S, Demissie K, Sauve R, Liston R, for the Fetal and Infant Health Study Group of the Canadian Perinatal Surveillance System: Preterm birth, stillbirth and infant mortality among triplet births in Canada, 1985-96. Paediatr Perinat Epidemiol. 2002, 16: 141-148. 10.1046\/j.1365-3016.2002.00413.x.","journal-title":"Paediatr Perinat Epidemiol"},{"key":"586_CR7","doi-asserted-by":"publisher","first-page":"1506","DOI":"10.1016\/j.ajog.2006.01.043","volume":"195","author":"D Getahun","year":"2006","unstructured":"Getahun D, Amre DK, Ananth CV, Demissie K, Rhoads GG: Temporal changes in rates of stillbirth, neonatal and infant mortality among triplet gestations in the United States. Am J Obstet Gynecol. 2006, 195: 1506-1511. 10.1016\/j.ajog.2006.01.043.","journal-title":"Am J Obstet Gynecol"},{"key":"586_CR8","first-page":"123","volume-title":"Canadian Perinatal Health Report","author":"S Liu","year":"2008","unstructured":"Liu S, Allen A, Fraser W: Preterm birth rate. Canadian Perinatal Health Report. 2008, Ottawa: Public Health Agency of Canada, 123-126. 2008","edition":"2008"},{"key":"586_CR9","doi-asserted-by":"publisher","first-page":"1323","DOI":"10.2105\/AJPH.92.8.1323","volume":"92","author":"B Blondel","year":"2002","unstructured":"Blondel B, Kogan MD, Alexander GR, Dattani N, Kramer MS, Macfarlane A, Wen SW: The impact of the increasing number of multiple births on the rates of preterm birth and low birthweight: an international study. Am J Pub Health. 2002, 92: 1323-1330. 10.2105\/AJPH.92.8.1323.","journal-title":"Am J Pub Health"},{"key":"586_CR10","first-page":"1","volume":"59","author":"TJ Mathews","year":"2011","unstructured":"Mathews TJ, MacDorman MF: Infant mortality statistics from the 2007 period linked birth\/infant death data set. Natl Vital Stat Rep. 2011, 59: 1-31.","journal-title":"Natl Vital Stat Rep"},{"key":"586_CR11","doi-asserted-by":"publisher","first-page":"495","DOI":"10.1016\/j.clp.2005.03.002","volume":"32","author":"L Rand","year":"2005","unstructured":"Rand L, Eddleman KA, Stone J: Long-term outcomes in multiple gestations. Clin Perinatol. 2005, 32: 495-513. 10.1016\/j.clp.2005.03.002.","journal-title":"Clin Perinatol"},{"key":"586_CR12","doi-asserted-by":"publisher","first-page":"301","DOI":"10.1016\/j.clp.2006.03.017","volume":"33","author":"POD Pharoah","year":"2006","unstructured":"Pharoah POD: Risk of cerebral palsy in multiple pregnancies. Clin Perinatol. 2006, 33: 301-313. 10.1016\/j.clp.2006.03.017.","journal-title":"Clin Perinatol"},{"key":"586_CR13","doi-asserted-by":"publisher","first-page":"631","DOI":"10.1016\/j.bpobgyn.2004.04.014","volume":"18","author":"I Blickstein","year":"2004","unstructured":"Blickstein I: How and why are triplets disadvantaged compared to twins?. Best Pract Res Clin Obstet Gynaecol. 2004, 18: 631-644. 10.1016\/j.bpobgyn.2004.04.014.","journal-title":"Best Pract Res Clin Obstet Gynaecol"},{"key":"586_CR14","first-page":"67","volume-title":"Canadian Perinatal Health Report","author":"L Huang","year":"2008","unstructured":"Huang L, Royle C, Boscoe M: Rate of live births to older mothers. Canadian Perinatal Health Report. 2008, Ottawa: Public Health Agency of Canada, 67-71. 2008","edition":"2008"},{"key":"586_CR15","doi-asserted-by":"publisher","first-page":"239","DOI":"10.1053\/sper.2002.34775","volume":"26","author":"B Blondel","year":"2002","unstructured":"Blondel B, Kaminski M: Trends in the occurrence, determinants, and consequences of multiple births. Semin Perinatol. 2002, 26: 239-249. 10.1053\/sper.2002.34775.","journal-title":"Semin Perinatol"},{"key":"586_CR16","doi-asserted-by":"publisher","first-page":"542","DOI":"10.1016\/j.fertnstert.2010.05.057","volume":"95","author":"J Gunby","year":"2011","unstructured":"Gunby J, Bissonnette F, Librach C, Cowan L, IVF Directors Group of the Canadian Fertility and Andrology Society: Assisted reproductive technologies (ART) in Canada: 2007 results from the Canadian ART register. Fertil Steril. 2011, 95: 542-547. 10.1016\/j.fertnstert.2010.05.057. e1-10. Epub 2010 Jul 24","journal-title":"Fertil Steril"},{"key":"586_CR17","doi-asserted-by":"publisher","first-page":"2189","DOI":"10.1016\/j.fertnstert.2009.03.102","volume":"93","author":"J Gunby","year":"2010","unstructured":"Gunby J, Bissonnette F, Librach C, Cowan L, IVF Directors Group of the Canadian Fertility and Andrology Society: Assisted reproductive technologies (ART) in Canada: 2006 results from the Canadian ART register. Fertil Steril. 2010, 93: 2189-2201. 10.1016\/j.fertnstert.2009.03.102. Epub 2009 May 12","journal-title":"Fertil Steril"},{"key":"586_CR18","doi-asserted-by":"publisher","first-page":"1721","DOI":"10.1016\/j.fertnstert.2008.02.125","volume":"91","author":"J Gunby","year":"2009","unstructured":"Gunby J, Bissonnette F, Librach C, Cowan L, IVF Directors Group of the Canadian Fertility and Andrology Society: Assisted reproductive technologies in Canada: 2005 results from the Canadian assisted reproductive technologies register. Fertil Steril. 2009, 91: 1721-1730. 10.1016\/j.fertnstert.2008.02.125. Epub 2008 Apr 18","journal-title":"Fertil Steril"},{"key":"586_CR19","doi-asserted-by":"publisher","first-page":"1123","DOI":"10.1016\/j.fertnstert.2007.05.015","volume":"89","author":"J Gunby","year":"2008","unstructured":"Gunby J, Bissonnette F, Librach C, Cowan L, IVF Directors Group of the Canadian Fertility and Andrology Society: Assisted reproductive technologies (ART) in Canada: 2004 results from the Canadian ART register. Fertil Steril. 2008, 89: 1123-1132. 10.1016\/j.fertnstert.2007.05.015. Epub 2007 Aug 13","journal-title":"Fertil Steril"},{"issue":"SS-5","key":"586_CR20","first-page":"1","volume":"58","author":"S Sunderam","year":"2009","unstructured":"Sunderam S, Chang J, Flowers L, Kulkarni A, Sentelle G, Jeng G, Macaluso M, Centers for Disease Control and Prevention (CDC): Assisted reproductive technology surveillance \u2013 United States, 2006. MMWR Surveill Summ. 2009, 58 (SS-5): 1-25.","journal-title":"MMWR Surveill Summ"},{"key":"586_CR21","first-page":"1","volume":"57","author":"VC Wright","year":"2008","unstructured":"Wright VC, Chang J, Jeng G, Macaluso M, Centers for Disease Control and Prevention (CDC): Assisted reproductive technology surveillance \u2013 United States, 2005. MMWR Surveill Summ. 2008, 57: 1-23.","journal-title":"MMWR Surveill Summ"},{"key":"586_CR22","first-page":"1","volume":"56","author":"VC Wright","year":"2007","unstructured":"Wright VC, Chang J, Jeng G, Chen M, Macaluso M, Centers for Disease Control and Prevention (CDC): Assisted reproductive technology surveillance \u2013 United States, 2004. MMWR Surveill Summ. 2007, 56: 1-22.","journal-title":"MMWR Surveill Summ"},{"key":"586_CR23","volume-title":"2009 Assisted Reproductive Technology Success Rates: National Summary and Fertility Clinic Reports","author":"Centers for Disease Control and Prevention, American Society for Reproductive Medicine, Society for Assisted Reproductive Technology","year":"2011","unstructured":"Centers for Disease Control and Prevention, American Society for Reproductive Medicine, Society for Assisted Reproductive Technology: 2009 Assisted Reproductive Technology Success Rates: National Summary and Fertility Clinic Reports. 2011, Atlanta: Department of Health and Human Services, http:\/\/www.cdc.gov\/art\/ART2009\/PDF\/ART_2009_Full.pdf . Accessed February 22, 2012"},{"key":"586_CR24","doi-asserted-by":"publisher","first-page":"307","DOI":"10.1016\/S0020-7292(03)00219-4","volume":"82","author":"I Blickstein","year":"2003","unstructured":"Blickstein I: The worldwide impact of iatrogenic pregnancy. Int J Gynaecol Obstet. 2003, 82: 307-317. 10.1016\/S0020-7292(03)00219-4.","journal-title":"Int J Gynaecol Obstet"},{"key":"586_CR25","doi-asserted-by":"publisher","first-page":"799","DOI":"10.1016\/S1701-2163(16)32246-0","volume":"28","author":"JK Min","year":"2006","unstructured":"Min JK, Claman P, Hughes E, Society of Obstetricians and Gynecologists of Canada; Canadian Fertility and Andrology Society: Guidelines for the number of embryos to transfer following in vitro fertilization. Joint SOGC\u2013CFAS guideline No. 182. J Obstet Gynaecol Can. 2006, 28: 799-813.","journal-title":"J Obstet Gynaecol Can"},{"key":"586_CR26","doi-asserted-by":"publisher","first-page":"363","DOI":"10.1016\/S1701-2163(16)34482-6","volume":"32","author":"JK Min","year":"2010","unstructured":"Min JK, Hughes E, Young D: Elective single embryo transfer following in vitro fertilization. Joint SOGC\u2013CFAS clinical practice guideline No. 241. J Obstet Gynaecol Can. 2010, 32: 363-377.","journal-title":"J Obstet Gynaecol Can"},{"key":"586_CR27","doi-asserted-by":"publisher","first-page":"1554","DOI":"10.1016\/j.fertnstert.2007.01.112","volume":"88","author":"RP Dickey","year":"2007","unstructured":"Dickey RP: The relative contribution of assisted reproductive technologies and ovulation induction to multiple births in the United States 5\u2009years after the society for assisted reproductive technology\/American society for reproductive medicine recommendation to limit the number of embryos transferred. Fertil Steril. 2007, 88: 1554-1561. 10.1016\/j.fertnstert.2007.01.112.","journal-title":"Fertil Steril"},{"key":"586_CR28","doi-asserted-by":"publisher","first-page":"1518","DOI":"10.1016\/j.fertnstert.2009.08.059","volume":"92","author":"American society for reproductive medicine and society for assisted reproductive technology","year":"2009","unstructured":"American society for reproductive medicine and society for assisted reproductive technology: Guidelines on number of embryos transferred. Fertil Steril. 2009, 92: 1518-1519. 10.1016\/j.fertnstert.2009.08.059.","journal-title":"Fertil Steril"},{"key":"586_CR29","first-page":"1","volume":"58","author":"JA Martin","year":"2010","unstructured":"Martin JA, Hamilton BE, Sutton PD, Ventura SJ, Mathews TJ, Kirmeyer S, Osterman MJK: Births: final data for 2007. Natl Vital Stat Rep. 2010, 58: 1-85.","journal-title":"Natl Vital Stat Rep"},{"key":"586_CR30","doi-asserted-by":"publisher","first-page":"327","DOI":"10.1016\/j.ajog.2005.01.007","volume":"193","author":"I Blickstein","year":"2005","unstructured":"Blickstein I, Keith LG: The decreased rates of triplet births: temporal trends and biologic speculations. Am J Obstet Gynecol. 2005, 193: 327-331. 10.1016\/j.ajog.2005.01.007.","journal-title":"Am J Obstet Gynecol"},{"key":"586_CR31","volume-title":"Canadian Vital Statistics System, 1991-2009","author":"Live births database","year":"2011","unstructured":"Live births database: Canadian Vital Statistics System, 1991-2009. 2011, Ottawa: Statistics Canada"},{"key":"586_CR32","doi-asserted-by":"crossref","first-page":"463","DOI":"10.1007\/BF03405086","volume":"94","author":"GL Woodward","year":"2003","unstructured":"Woodward GL, Bienefeld MK, Ardal S: Under-reporting of live births in Ontario: 1991-1997. Can J Public Health. 2003, 94: 463-467.","journal-title":"Can J Public Health"},{"key":"586_CR33","volume-title":"Joinpoint Regression Program, Version 3.4.3","author":"National Cancer Institute","year":"2010","unstructured":"National Cancer Institute: Joinpoint Regression Program, Version 3.4.3. 2010, Statistical Methodology and Applications Branch and Data Modeling Branch, Surveillance Research Program, National Cancer Institute"},{"key":"586_CR34","doi-asserted-by":"publisher","first-page":"550","DOI":"10.1016\/j.fertnstert.2006.11.156","volume":"88","author":"J Gunby","year":"2007","unstructured":"Gunby J, Daya S, IVF Directors Group of the Canadian Fertility and Andrology Society: Assisted reproductive technologies (ART) in Canada: 2003 results from the Canadian ART register. Fertil Steril. 2007, 88: 550-559. 10.1016\/j.fertnstert.2006.11.156. Epub 2007 Feb 14","journal-title":"Fertil Steril"},{"key":"586_CR35","doi-asserted-by":"publisher","first-page":"107","DOI":"10.1093\/humupd\/dmq028","volume":"17","author":"A Maheshwari","year":"2011","unstructured":"Maheshwari A, Griffiths S, Bhattacharya S: Global variation in the uptake of single embryo transfer. Hum Reprod Update. 2011, 17: 107-120. 10.1093\/humupd\/dmq028.","journal-title":"Hum Reprod Update"},{"key":"586_CR36","doi-asserted-by":"publisher","first-page":"159","DOI":"10.1016\/S1701-2163(16)34803-4","volume":"33","author":"JL Cook","year":"2011","unstructured":"Cook JL, Collins J, Buckett W, Racowsky C, Hughes E, Jarvi K: Assisted reproductive technology-related multiple births: Canada in an international context. J Obstet Gynaecol Can. 2011, 33: 159-167.","journal-title":"J Obstet Gynaecol Can"},{"key":"586_CR37","volume-title":"Bill 26: An act respecting clinical and research activities related to assisted procreation","author":"National Assembly of Quebec","year":"2009","unstructured":"National Assembly of Quebec: Bill 26: An act respecting clinical and research activities related to assisted procreation. 2009, http:\/\/www2.publicationsduquebec.gouv.qc.ca\/dynamicSearch\/telecharge.php?type = 5&file = 2009C30A. PDF . Accessed February 22, 2012"},{"key":"586_CR38","doi-asserted-by":"publisher","first-page":"500","DOI":"10.1016\/j.rbmo.2011.05.020","volume":"23","author":"F Bissonnette","year":"2011","unstructured":"Bissonnette F, Phillips SJ, Gunby J, Holzer H, Mahutte N, St-Michel P, Kadoch U: Working to eliminate multiple pregnancies: a success story in Qu\u00e9bec. Reprod Biomed Online. 2011, 23: 500-504. 10.1016\/j.rbmo.2011.05.020.","journal-title":"Reprod Biomed Online"},{"key":"586_CR39","doi-asserted-by":"publisher","first-page":"2202","DOI":"10.1093\/humrep\/dem120","volume":"22","author":"PO Karlstrom","year":"2007","unstructured":"Karlstrom PO, Bergh C: Reducing the number of embryos transferred in Sweden-impact on delivery and multiple birth rates. Hum Reprod. 2007, 22: 2202-2207. 10.1093\/humrep\/dem120.","journal-title":"Hum Reprod"},{"key":"586_CR40","volume-title":"Births","author":"Statistics Canada","year":"2009","unstructured":"Statistics Canada: Births. 2009, Catalogue no. 84F0210X. http:\/\/www.statcan.gc.ca\/pub\/84f0210x\/84f0210x2009000-eng.pdf . Accessed August 31, 2012, . Table 1,"},{"key":"586_CR41","first-page":"1","volume":"61","author":"JA Martin","year":"2012","unstructured":"Martin JA, Hamilton BE, Ventura SJ, Osterman MJK, Wilson E, Mathews TJ, Division of Vital Statistics: Births: final data for 2010, table 27. Natl Vital Stat Rep. 2012, 61: 1-100. http:\/\/www.cdc.gov\/nchs\/data\/nvsr\/nvsr61\/nvsr61_01.pdf . Accessed August 31, 2012","journal-title":"Natl Vital Stat Rep"}],"container-title":["BMC Pregnancy and Childbirth"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/link.springer.com\/article\/10.1186\/1471-2393-12-103\/fulltext.html","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/link.springer.com\/content\/pdf\/10.1186\/1471-2393-12-103.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/link.springer.com\/content\/pdf\/10.1186\/1471-2393-12-103","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"},{"URL":"http:\/\/link.springer.com\/content\/pdf\/10.1186\/1471-2393-12-103.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2020,7,14]],"date-time":"2020-07-14T07:15:40Z","timestamp":1594710940000},"score":1,"resource":{"primary":{"URL":"https:\/\/bmcpregnancychildbirth.biomedcentral.com\/articles\/10.1186\/1471-2393-12-103"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2012,9,27]]},"references-count":41,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2012,12]]}},"alternative-id":["586"],"URL":"https:\/\/doi.org\/10.1186\/1471-2393-12-103","relation":{},"ISSN":["1471-2393"],"issn-type":[{"value":"1471-2393","type":"electronic"}],"subject":[],"published":{"date-parts":[[2012,9,27]]},"article-number":"103"}}