Multiple birth (English Wikipedia)

"Multiple Pregnancy - ACOG". www.acog.org. Archived from the original on 2016-01-11. Retrieved 2016-01-13.
"Opinion Number 719: Multifetal Pregnancy Reduction". American College of Obstetricians and Gynecologists' Committee on Ethics. September 2017.

africanews.com (Global: 2,572^nd place; English: 1,864^th place)

"Record-breaking nonuplets celebrate their second birthday". africanews. 2023-05-04. Retrieved 2024-01-31.

ahrq.gov (Global: low place; English: 7,784^th place)

hcup-us.ahrq.gov

Moore JE, Witt WP, Elixhauser A (April 2014). "Complicating Conditions Associate With Childbirth, by Delivery Method and Payer, 2011". HCUP Statistical Brief (173). Rockville, MD: Agency for Healthcare Research and Quality. Archived from the original on 2014-07-14. Retrieved 2014-06-06.

ajogmfm.org (Global: low place; English: low place)

Squillante, Marisa; Saccone, Gabriele (2025-10-01). "Duality and the divine: the symbolism and suspicion of twins in ancient Greece and Rome". American Journal of Obstetrics & Gynecology MFM. 7 (10). doi:10.1016/j.ajogmf.2025.101758. ISSN 2589-9333. PMID 40819807.

baby2see.com (Global: low place; English: low place)

"Multiples in pregnancy - twins triplets quads identical and fraternal". Baby2see.com. 2006. Archived from the original on 2015-02-04. Retrieved 2015-04-15.

baltimoresun.com (Global: 588^th place; English: 292^nd place)

Cohn, Meredith (October 23, 2015). "Rare identical triplets born to Baltimore couple". The Baltimore Sun. Archived from the original on October 24, 2015. Retrieved October 23, 2015.

bbc.co.uk (Global: 11^th place; English: 10^th place)

news.bbc.co.uk

"US woman gives birth to octuplets". BBC. 27 January 2009. Archived from the original on 27 January 2009.

bbc.co.uk

Gallagher, James (23 November 2011). "Women can choose Caesarean birth". BBC. Archived from the original on 2012-08-19.

cam.ac.uk (Global: 569^th place; English: 354^th place)

fitzmuseum.cam.ac.uk

"Leda's Children". The Fitzwilliam Museum. Retrieved 2026-05-30.

cdc.gov (Global: 251^st place; English: 248^th place)

"National Center for Health Statistics - Multiple Births". Archived from the original on 2013-10-20.
Births: Final Data for 2010 (PDF) (Report). Vol. 61. National Vital Statistics Reports. August 28, 2012. Archived from the original (PDF) on July 20, 2017.

christian.org.uk (Global: low place; English: low place)

""Selective Reduction Abortions" On the Rise". 13 January 2012.
"US article exposes trend to abort half a twin pregnancy". 31 August 2011.

clevelandclinic.org (Global: 4,153^rd place; English: 2,922^nd place)

my.clevelandclinic.org

"Multiple Birth: Twins, Triplets, Complications & Symptoms". Cleveland Clinic. Retrieved 2023-04-13.

doi.org (Global: 2^nd place; English: 2^nd place)

Kulkarni AD, Jamieson DJ, Jones HW, Kissin DM, Gallo MF, Macaluso M, Adashi EY (2013). "Fertility Treatments and Multiple Births in the United States". The New England Journal of Medicine. 369 (23): 2218–2225. doi:10.1056/NEJMoa1301467. PMID 24304051.
Mirsky, A. F.; Delisi, L. E.; Buchsbaum, M. S.; Quinn, O. W.; Schwerdt, P.; Siever, L. J.; Mann, L.; Weingartner, H.; Zec, R.; Sostek, A. (1984). "The Genain Quadruplets: Psychological studies". Psychiatry Research. 13 (1): 77–93. doi:10.1016/0165-1781(84)90120-3. PMID 6151205. S2CID 43234604.
Beemsterboer SN, Homburg R, Gorter NA, Schats R, Hompes PG, Lambalk CB (2006). "The paradox of declining fertility but increasing twinning rates with advancing maternal age". Hum. Reprod. 21 (6): 1531–2. doi:10.1093/humrep/del009. PMID 16497698.
Alexander GR, Kogan M, Martin J, Papiernik E (March 1998). "What are the fetal growth patterns of singletons, twins, and triplets in the United States?". Clin Obstet Gynecol. 41 (1): 114–25. doi:10.1097/00003081-199803000-00017. PMID 9504230.
Note: This study was done by looking at the 1991–1995 U.S. Natality Files, which were received from the National Center for Health Statistics
Neilson, JP; West, HM; Dowswell, T (5 February 2014). "Betamimetics for inhibiting preterm labour". The Cochrane Database of Systematic Reviews. 2014 (2) CD004352. doi:10.1002/14651858.CD004352.pub3. PMC 10603219. PMID 24500892.
Yamasmit, W; Chaithongwongwatthana, S; Tolosa, JE; Limpongsanurak, S; Pereira, L; Lumbiganon, P (8 December 2015). "Prophylactic oral betamimetics for reducing preterm birth in women with a twin pregnancy". The Cochrane Database of Systematic Reviews. 2015 (12) CD004733. doi:10.1002/14651858.CD004733.pub4. PMC 7386823. PMID 26645888.
Rafael, TJ; Berghella, V; Alfirevic, Z (10 September 2014). "Cervical stitch (cerclage) for preventing preterm birth in multiple pregnancy". The Cochrane Database of Systematic Reviews. 2014 (9) CD009166. doi:10.1002/14651858.CD009166.pub2. PMC 10629495. PMID 25208049. S2CID 205198527.
Pharoah PO, Cooke T (1996). "Cerebral palsy and multiple births". Arch. Dis. Child. Fetal Neonatal Ed. 75 (3): F174–7. doi:10.1136/fn.75.3.f174. PMC 1061194. PMID 8976682.
Note: Study looked at the registered births of babies born with cerebral palsy from 1982 to 1989 in the counties of Merseyside and Cheshire.
Hammond KR (1998). "Multifetal pregnancy reduction". J Obstet Gynecol Neonatal Nurs. 27 (3): 338–43. doi:10.1111/j.1552-6909.1998.tb02657.x. PMID 9620827.
Elsner CW, Tucker MJ, Sweitzer CL, Brockman WD, Morton PC, Wright G, Toledo AA (1997). "Multiple pregnancy rate and embryo number transferred during in vitro fertilization". Am. J. Obstet. Gynecol. 177 (2): 350–355, discussion 355–357. doi:10.1016/S0002-9378(97)70197-2. PMID 9290450.
McCall, CA; Grimes, DA; Lyerly, AD (June 2013). ""Therapeutic" bed rest in pregnancy: unethical and unsupported by data". Obstetrics and Gynecology. 121 (6): 1305–8. doi:10.1097/aog.0b013e318293f12f. PMID 23812466. S2CID 9069311.
Evans, MI; Andriole, S; Britt, DW (2014). "Fetal reduction: 25 years' experience". Fetal Diagnosis and Therapy. 35 (2): 69–82. doi:10.1159/000357974. PMID 24525884.
Legendre, Claire-Marie; Moutel, Grégoire; Drouin, Régen; Favre, Romain; Bouffard, Chantal (2013). "Differences between selective termination of pregnancy and fetal reduction in multiple pregnancy: A narrative review". Reproductive BioMedicine Online. 26 (6): 542–54. doi:10.1016/j.rbmo.2013.02.004. PMID 23518032.
Dodd, JM; Dowswell, T; Crowther, CA (6 November 2015). "Specialised antenatal clinics for women with a multiple pregnancy for improving maternal and infant outcomes". The Cochrane Database of Systematic Reviews. 11 (11) CD005300. doi:10.1002/14651858.CD005300.pub4. PMC 8536469. PMID 26545291.
Kwok, Man Ki; Yeung, Shiu Lun Au; Leung, Gabriel M.; Mary Schooling, C. (2016-03-01). "Birth weight and adult cardiovascular risk factors using multiple birth status as an instrumental variable in the 1958 British Birth Cohort". Preventive Medicine. 84: 69–75. doi:10.1016/j.ypmed.2015.12.016. ISSN 0091-7435. PMID 26748345.
Bricker, L; Reed, K; Wood, L; Neilson, JP (24 November 2015). "Nutritional advice for improving outcomes in multiple pregnancies". The Cochrane Database of Systematic Reviews. 2015 (11) CD008867. doi:10.1002/14651858.CD008867.pub3. PMC 7133547. PMID 26599328.
Hofmeyr, GJ; Barrett, JF; Crowther, CA (19 December 2015). "Planned caesarean section for women with a twin pregnancy". The Cochrane Database of Systematic Reviews. 12 (12) CD006553. doi:10.1002/14651858.CD006553.pub3. PMC 4110647. PMID 26684389.
Barrett JF, Hannah ME, Hutton EK, Willan AR, Allen AC, Armson BA, Gafni A, Joseph KS, Mason D, Ohlsson A, Ross S, Sanchez JJ, Asztalos EV (2013). "A Randomized Trial of Planned Cesarean or Vaginal Delivery for Twin Pregnancy". The New England Journal of Medicine. 369 (14): 1295–1305. doi:10.1056/NEJMoa1214939. PMC 3954096. PMID 24088091.
Lee HC, Gould JB, Boscardin WJ, El-Sayed YY, Blumenfeld YJ (2011). "Trends in Cesarean Delivery for Twin Births in the United States". Obstetrics & Gynecology. 118 (5): 1095–101. doi:10.1097/AOG.0b013e3182318651. PMC 3202294. PMID 22015878.
Shub, A; Walker, SP (23 April 2015). "Planned early delivery versus expectant management for monoamniotic twins". The Cochrane Database of Systematic Reviews. 4 (4) CD008820. doi:10.1002/14651858.CD008820.pub2. PMC 8947902. PMID 25906204.
Kaufman GE, Malone FD, Harvey-Wilkes KB, Chelmow D, Penzias AS, D'Alton ME (1998). "Neonatal morbidity and mortality associated with triplet pregnancy". Obstet Gynecol. 91 (3): 342–8. doi:10.1016/s0029-7844(97)00686-8. PMID 9491857. S2CID 12722478.
Squillante, Marisa; Saccone, Gabriele (2025-10-01). "Duality and the divine: the symbolism and suspicion of twins in ancient Greece and Rome". American Journal of Obstetrics & Gynecology MFM. 7 (10). doi:10.1016/j.ajogmf.2025.101758. ISSN 2589-9333. PMID 40819807.
Sigalos, George Α.; Triantafyllidou, Olga; Vlahos, Nikos F. (2016-09-15). "Novel embryo selection techniques to increase embryo implantation in IVF attempts". Archives of Gynecology and Obstetrics. 294 (6): 1117–1124. doi:10.1007/s00404-016-4196-5. ISSN 0932-0067. PMID 27628754. S2CID 38282141.
Guntram, Lisa; Zeiler, Kristin (2019-05-17). "The Ethics of the Societal Entrenchment-approach and the case of live uterus transplantation-IVF". Medicine, Health Care and Philosophy. 22 (4): 557–571. doi:10.1007/s11019-019-09891-w. ISSN 1386-7423. PMC 6842335. PMID 31102175.
Porta, Roser; Capdevila, Eva; Botet, Francesc; Verd, Sergi; Ginovart, Gemma; Moliner, Elisenda; Nicolàs, Marta; Rios, Jose (2017-09-22). "Morbidity and mortality of very low birth weight multiples compared with singletons". The Journal of Maternal-Fetal & Neonatal Medicine. 32 (3): 389–397. doi:10.1080/14767058.2017.1379073. ISSN 1476-7058. PMID 28936899. S2CID 26741575.
Rao, Radhika (August 2015). "Selective Reduction: "A Soft Cover for Hard Choices" or Another Name for Abortion?". The Journal of Law, Medicine & Ethics. 43 (2): 196–205. doi:10.1111/jlme.12233. ISSN 1073-1105. PMID 26242939. S2CID 40482252.

go.com (Global: 97^th place; English: 79^th place)

abcnews.go.com

Mohney, Gillian (December 5, 2013). "Identical Triplets, Conceived without Fertility Drugs, are 'One in a Million'". ABC News. Retrieved January 15, 2015.

health.am (Global: low place; English: low place)

Bush, Melissa; Pernoll, Martin L. (15 September 2010). "Multiple Pregnancy". Pregnancy Health Center. Health.am.

huggies.com.au (Global: low place; English: low place)

"Identical Triplets - What You Need to Know - Huggies AU". www.huggies.com.au. Retrieved 2023-04-13.

isogg.org (Global: low place; English: low place)

"Coefficient of relationship - ISOGG Wiki". isogg.org. Retrieved 2021-04-03.

keepkidshealthy.com (Global: low place; English: low place)

"Twin Statistics - What is your chance of having twins?". keepkidshealthy.com. Archived from the original on 7 February 2008. Retrieved 13 May 2016.

latimes.com (Global: 32^nd place; English: 21^st place)

latimesblogs.latimes.com

"Octuplets born in Bellflower". LA Times. 26 January 2009. Archived from the original on 2014-12-20.

medlineplus.gov (Global: 1,521^st place; English: 1,017^th place)

"Is the probability of having twins determined by genetics?: MedlinePlus Genetics". medlineplus.gov. Retrieved 2021-04-06.

mehrnews.com (Global: 801^st place; English: 2,342^nd place)

"واگذاری رایگان مسکن به خانواده‌های دارای فرزندان چهارقلو به بالا" [Free housing for families with four or more children]. Mehr News Agency (in Persian). 14 August 2023.

mississauga.com (Global: low place; English: 8,645^th place)

Le, Julia (26 July 2011). "Triplets set world record". Mississauga News. Mississauga ON. Retrieved 1 September 2021.
Note: Record was not confirmed until July 2011

mostonline.org (Global: low place; English: low place)

"Mothers of Supertwins: Supertwins Statistics". Retrieved January 15, 2015.{{cite web}}: CS1 maint: deprecated archival service (link)

nice.org.uk (Global: 4,081^st place; English: 3,905^th place)

nice.org.uk

"Glossary: Multiple pregnancy: antenatal care for twin and triplet pregnancies". NICE. September 2011.

guidance.nice.org.uk

"Fertility: assessment and treatment for people with fertility problems". National Institute for Health and Care Excellence (NICE) guidelines. February 2013. Archived from the original on 2013-02-23. Retrieved 2024-03-31.

nih.gov (Global: 5^th place; English: 5^th place)

pubmed.ncbi.nlm.nih.gov

Kulkarni AD, Jamieson DJ, Jones HW, Kissin DM, Gallo MF, Macaluso M, Adashi EY (2013). "Fertility Treatments and Multiple Births in the United States". The New England Journal of Medicine. 369 (23): 2218–2225. doi:10.1056/NEJMoa1301467. PMID 24304051.
Gill, Prabhcharan; Lende, Michelle N.; Van Hook, James W. (2023), "Twin Births", StatPearls, Treasure Island (FL): StatPearls Publishing, PMID 29630252, retrieved 2023-12-10
Mirsky, A. F.; Delisi, L. E.; Buchsbaum, M. S.; Quinn, O. W.; Schwerdt, P.; Siever, L. J.; Mann, L.; Weingartner, H.; Zec, R.; Sostek, A. (1984). "The Genain Quadruplets: Psychological studies". Psychiatry Research. 13 (1): 77–93. doi:10.1016/0165-1781(84)90120-3. PMID 6151205. S2CID 43234604.
Beemsterboer SN, Homburg R, Gorter NA, Schats R, Hompes PG, Lambalk CB (2006). "The paradox of declining fertility but increasing twinning rates with advancing maternal age". Hum. Reprod. 21 (6): 1531–2. doi:10.1093/humrep/del009. PMID 16497698.
Alexander GR, Kogan M, Martin J, Papiernik E (March 1998). "What are the fetal growth patterns of singletons, twins, and triplets in the United States?". Clin Obstet Gynecol. 41 (1): 114–25. doi:10.1097/00003081-199803000-00017. PMID 9504230.
Note: This study was done by looking at the 1991–1995 U.S. Natality Files, which were received from the National Center for Health Statistics
Neilson, JP; West, HM; Dowswell, T (5 February 2014). "Betamimetics for inhibiting preterm labour". The Cochrane Database of Systematic Reviews. 2014 (2) CD004352. doi:10.1002/14651858.CD004352.pub3. PMC 10603219. PMID 24500892.
Yamasmit, W; Chaithongwongwatthana, S; Tolosa, JE; Limpongsanurak, S; Pereira, L; Lumbiganon, P (8 December 2015). "Prophylactic oral betamimetics for reducing preterm birth in women with a twin pregnancy". The Cochrane Database of Systematic Reviews. 2015 (12) CD004733. doi:10.1002/14651858.CD004733.pub4. PMC 7386823. PMID 26645888.
Rafael, TJ; Berghella, V; Alfirevic, Z (10 September 2014). "Cervical stitch (cerclage) for preventing preterm birth in multiple pregnancy". The Cochrane Database of Systematic Reviews. 2014 (9) CD009166. doi:10.1002/14651858.CD009166.pub2. PMC 10629495. PMID 25208049. S2CID 205198527.
Pharoah PO, Cooke T (1996). "Cerebral palsy and multiple births". Arch. Dis. Child. Fetal Neonatal Ed. 75 (3): F174–7. doi:10.1136/fn.75.3.f174. PMC 1061194. PMID 8976682.
Note: Study looked at the registered births of babies born with cerebral palsy from 1982 to 1989 in the counties of Merseyside and Cheshire.
Hammond KR (1998). "Multifetal pregnancy reduction". J Obstet Gynecol Neonatal Nurs. 27 (3): 338–43. doi:10.1111/j.1552-6909.1998.tb02657.x. PMID 9620827.
Elsner CW, Tucker MJ, Sweitzer CL, Brockman WD, Morton PC, Wright G, Toledo AA (1997). "Multiple pregnancy rate and embryo number transferred during in vitro fertilization". Am. J. Obstet. Gynecol. 177 (2): 350–355, discussion 355–357. doi:10.1016/S0002-9378(97)70197-2. PMID 9290450.
McCall, CA; Grimes, DA; Lyerly, AD (June 2013). ""Therapeutic" bed rest in pregnancy: unethical and unsupported by data". Obstetrics and Gynecology. 121 (6): 1305–8. doi:10.1097/aog.0b013e318293f12f. PMID 23812466. S2CID 9069311.
Evans, MI; Andriole, S; Britt, DW (2014). "Fetal reduction: 25 years' experience". Fetal Diagnosis and Therapy. 35 (2): 69–82. doi:10.1159/000357974. PMID 24525884.
Legendre, Claire-Marie; Moutel, Grégoire; Drouin, Régen; Favre, Romain; Bouffard, Chantal (2013). "Differences between selective termination of pregnancy and fetal reduction in multiple pregnancy: A narrative review". Reproductive BioMedicine Online. 26 (6): 542–54. doi:10.1016/j.rbmo.2013.02.004. PMID 23518032.
Dodd, JM; Dowswell, T; Crowther, CA (6 November 2015). "Specialised antenatal clinics for women with a multiple pregnancy for improving maternal and infant outcomes". The Cochrane Database of Systematic Reviews. 11 (11) CD005300. doi:10.1002/14651858.CD005300.pub4. PMC 8536469. PMID 26545291.
Kwok, Man Ki; Yeung, Shiu Lun Au; Leung, Gabriel M.; Mary Schooling, C. (2016-03-01). "Birth weight and adult cardiovascular risk factors using multiple birth status as an instrumental variable in the 1958 British Birth Cohort". Preventive Medicine. 84: 69–75. doi:10.1016/j.ypmed.2015.12.016. ISSN 0091-7435. PMID 26748345.
Bricker, L; Reed, K; Wood, L; Neilson, JP (24 November 2015). "Nutritional advice for improving outcomes in multiple pregnancies". The Cochrane Database of Systematic Reviews. 2015 (11) CD008867. doi:10.1002/14651858.CD008867.pub3. PMC 7133547. PMID 26599328.
Hofmeyr, GJ; Barrett, JF; Crowther, CA (19 December 2015). "Planned caesarean section for women with a twin pregnancy". The Cochrane Database of Systematic Reviews. 12 (12) CD006553. doi:10.1002/14651858.CD006553.pub3. PMC 4110647. PMID 26684389.
Barrett JF, Hannah ME, Hutton EK, Willan AR, Allen AC, Armson BA, Gafni A, Joseph KS, Mason D, Ohlsson A, Ross S, Sanchez JJ, Asztalos EV (2013). "A Randomized Trial of Planned Cesarean or Vaginal Delivery for Twin Pregnancy". The New England Journal of Medicine. 369 (14): 1295–1305. doi:10.1056/NEJMoa1214939. PMC 3954096. PMID 24088091.
Lee HC, Gould JB, Boscardin WJ, El-Sayed YY, Blumenfeld YJ (2011). "Trends in Cesarean Delivery for Twin Births in the United States". Obstetrics & Gynecology. 118 (5): 1095–101. doi:10.1097/AOG.0b013e3182318651. PMC 3202294. PMID 22015878.
Shub, A; Walker, SP (23 April 2015). "Planned early delivery versus expectant management for monoamniotic twins". The Cochrane Database of Systematic Reviews. 4 (4) CD008820. doi:10.1002/14651858.CD008820.pub2. PMC 8947902. PMID 25906204.
Kaufman GE, Malone FD, Harvey-Wilkes KB, Chelmow D, Penzias AS, D'Alton ME (1998). "Neonatal morbidity and mortality associated with triplet pregnancy". Obstet Gynecol. 91 (3): 342–8. doi:10.1016/s0029-7844(97)00686-8. PMID 9491857. S2CID 12722478.
Squillante, Marisa; Saccone, Gabriele (2025-10-01). "Duality and the divine: the symbolism and suspicion of twins in ancient Greece and Rome". American Journal of Obstetrics & Gynecology MFM. 7 (10). doi:10.1016/j.ajogmf.2025.101758. ISSN 2589-9333. PMID 40819807.
Sigalos, George Α.; Triantafyllidou, Olga; Vlahos, Nikos F. (2016-09-15). "Novel embryo selection techniques to increase embryo implantation in IVF attempts". Archives of Gynecology and Obstetrics. 294 (6): 1117–1124. doi:10.1007/s00404-016-4196-5. ISSN 0932-0067. PMID 27628754. S2CID 38282141.
Guntram, Lisa; Zeiler, Kristin (2019-05-17). "The Ethics of the Societal Entrenchment-approach and the case of live uterus transplantation-IVF". Medicine, Health Care and Philosophy. 22 (4): 557–571. doi:10.1007/s11019-019-09891-w. ISSN 1386-7423. PMC 6842335. PMID 31102175.
Porta, Roser; Capdevila, Eva; Botet, Francesc; Verd, Sergi; Ginovart, Gemma; Moliner, Elisenda; Nicolàs, Marta; Rios, Jose (2017-09-22). "Morbidity and mortality of very low birth weight multiples compared with singletons". The Journal of Maternal-Fetal & Neonatal Medicine. 32 (3): 389–397. doi:10.1080/14767058.2017.1379073. ISSN 1476-7058. PMID 28936899. S2CID 26741575.
Rao, Radhika (August 2015). "Selective Reduction: "A Soft Cover for Hard Choices" or Another Name for Abortion?". The Journal of Law, Medicine & Ethics. 43 (2): 196–205. doi:10.1111/jlme.12233. ISSN 1073-1105. PMID 26242939. S2CID 40482252.

ncbi.nlm.nih.gov

Gill, Prabhcharan; Lende, Michelle N.; Van Hook, James W. (2023), "Twin Births", StatPearls, Treasure Island (FL): StatPearls Publishing, PMID 29630252, retrieved 2023-12-10
Neilson, JP; West, HM; Dowswell, T (5 February 2014). "Betamimetics for inhibiting preterm labour". The Cochrane Database of Systematic Reviews. 2014 (2) CD004352. doi:10.1002/14651858.CD004352.pub3. PMC 10603219. PMID 24500892.
Yamasmit, W; Chaithongwongwatthana, S; Tolosa, JE; Limpongsanurak, S; Pereira, L; Lumbiganon, P (8 December 2015). "Prophylactic oral betamimetics for reducing preterm birth in women with a twin pregnancy". The Cochrane Database of Systematic Reviews. 2015 (12) CD004733. doi:10.1002/14651858.CD004733.pub4. PMC 7386823. PMID 26645888.
Rafael, TJ; Berghella, V; Alfirevic, Z (10 September 2014). "Cervical stitch (cerclage) for preventing preterm birth in multiple pregnancy". The Cochrane Database of Systematic Reviews. 2014 (9) CD009166. doi:10.1002/14651858.CD009166.pub2. PMC 10629495. PMID 25208049. S2CID 205198527.
Pharoah PO, Cooke T (1996). "Cerebral palsy and multiple births". Arch. Dis. Child. Fetal Neonatal Ed. 75 (3): F174–7. doi:10.1136/fn.75.3.f174. PMC 1061194. PMID 8976682.
Note: Study looked at the registered births of babies born with cerebral palsy from 1982 to 1989 in the counties of Merseyside and Cheshire.
Dodd, JM; Dowswell, T; Crowther, CA (6 November 2015). "Specialised antenatal clinics for women with a multiple pregnancy for improving maternal and infant outcomes". The Cochrane Database of Systematic Reviews. 11 (11) CD005300. doi:10.1002/14651858.CD005300.pub4. PMC 8536469. PMID 26545291.
Bricker, L; Reed, K; Wood, L; Neilson, JP (24 November 2015). "Nutritional advice for improving outcomes in multiple pregnancies". The Cochrane Database of Systematic Reviews. 2015 (11) CD008867. doi:10.1002/14651858.CD008867.pub3. PMC 7133547. PMID 26599328.
Hofmeyr, GJ; Barrett, JF; Crowther, CA (19 December 2015). "Planned caesarean section for women with a twin pregnancy". The Cochrane Database of Systematic Reviews. 12 (12) CD006553. doi:10.1002/14651858.CD006553.pub3. PMC 4110647. PMID 26684389.
Barrett JF, Hannah ME, Hutton EK, Willan AR, Allen AC, Armson BA, Gafni A, Joseph KS, Mason D, Ohlsson A, Ross S, Sanchez JJ, Asztalos EV (2013). "A Randomized Trial of Planned Cesarean or Vaginal Delivery for Twin Pregnancy". The New England Journal of Medicine. 369 (14): 1295–1305. doi:10.1056/NEJMoa1214939. PMC 3954096. PMID 24088091.
Lee HC, Gould JB, Boscardin WJ, El-Sayed YY, Blumenfeld YJ (2011). "Trends in Cesarean Delivery for Twin Births in the United States". Obstetrics & Gynecology. 118 (5): 1095–101. doi:10.1097/AOG.0b013e3182318651. PMC 3202294. PMID 22015878.
Shub, A; Walker, SP (23 April 2015). "Planned early delivery versus expectant management for monoamniotic twins". The Cochrane Database of Systematic Reviews. 4 (4) CD008820. doi:10.1002/14651858.CD008820.pub2. PMC 8947902. PMID 25906204.
Guntram, Lisa; Zeiler, Kristin (2019-05-17). "The Ethics of the Societal Entrenchment-approach and the case of live uterus transplantation-IVF". Medicine, Health Care and Philosophy. 22 (4): 557–571. doi:10.1007/s11019-019-09891-w. ISSN 1386-7423. PMC 6842335. PMID 31102175.

nytimes.com (Global: 7^th place; English: 7^th place)

Padawer, Ruth (August 10, 2011). "The Two-Minus-One Pregnancy". New York Times Magazine.

oed.com (Global: 743^rd place; English: 419^th place)

"quad". Oxford English Dictionary (online ed.). Oxford University Press. (Subscription or participating institution membership required.)
"quin". Oxford English Dictionary (online ed.). Oxford University Press. (Subscription or participating institution membership required.)
"quint". Oxford English Dictionary (online ed.). Oxford University Press. (Subscription or participating institution membership required.)

people.com (Global: 69^th place; English: 49^th place)

Keating, Caitlin (January 10, 2015). "1 in a Million Chance: Minnesota Mom Welcomes Identical Triplets". People. Archived from the original on January 12, 2015. Retrieved January 15, 2015.

psu.edu (Global: 299^th place; English: 159^th place)

news.psu.edu

"The day after Mother's Day, the Gosselin sextuplets arrive". Penn State University. 10 May 2004. Archived from the original on 2016-10-23.

reproductivefacts.org (Global: low place; English: low place)

"Multiple Pregnancy and Birth: Twins, Triplets, and High Order Multiples (booklet)". www.reproductivefacts.org. Retrieved 2021-04-03.

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cam.ac.uk (Global: 569^th place; English: 354^th place)

cdc.gov (Global: 251^st place; English: 248^th place)

clevelandclinic.org (Global: 4,153^rd place; English: 2,922^nd place)

doi.org (Global: 2^nd place; English: 2^nd place)

go.com (Global: 97^th place; English: 79^th place)

latimes.com (Global: 32^nd place; English: 21^st place)

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people.com (Global: 69^th place; English: 49^th place)

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science.org (Global: 1,007^th place; English: 665^th place)

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