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Table representation of search results timeline featuring number of search results per year.

Year Number of Results
1811 2
1818 2
1822 1
1823 1
1824 1
1825 1
1831 1
1835 1
1836 1
1843 2
1844 2
1858 1
1865 1
1869 5
1874 1
1875 2
1877 2
1889 1
1892 2
1893 4
1894 3
1895 1
1897 1
1902 1
1907 1
1909 1
1911 2
1912 2
1914 2
1915 3
1916 4
1917 1
1919 1
1921 2
1922 1
1924 3
1925 4
1926 5
1927 4
1928 2
1929 8
1930 4
1931 4
1932 4
1933 4
1934 7
1935 5
1936 6
1937 4
1938 4
1939 5
1940 4
1941 1
1942 4
1943 1
1944 6
1945 13
1946 55
1947 60
1948 55
1949 57
1950 76
1951 90
1952 101
1953 119
1954 109
1955 133
1956 109
1957 155
1958 146
1959 120
1960 121
1961 108
1962 130
1963 211
1964 294
1965 273
1966 252
1967 333
1968 341
1969 363
1970 456
1971 444
1972 391
1973 445
1974 448
1975 467
1976 527
1977 442
1978 549
1979 509
1980 479
1981 572
1982 515
1983 548
1984 618
1985 591
1986 606
1987 611
1988 641
1989 602
1990 741
1991 701
1992 705
1993 745
1994 746
1995 753
1996 809
1997 867
1998 894
1999 907
2000 1035
2001 987
2002 1050
2003 1050
2004 1137
2005 1239
2006 1384
2007 1387
2008 1447
2009 1524
2010 1527
2011 1527
2012 1605
2013 1698
2014 1632
2015 1713
2016 1651
2017 1564
2018 1539
2019 1558
2020 1610
2021 138
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49,059 results
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Page 1
A review of the mechanisms and evidence for typical and atypical twinning.
McNamara HC, Kane SC, Craig JM, Short RV, Umstad MP. McNamara HC, et al. Am J Obstet Gynecol. 2016 Feb;214(2):172-191. doi: 10.1016/j.ajog.2015.10.930. Epub 2015 Nov 6. Am J Obstet Gynecol. 2016. PMID: 26548710 Review.
The mechanisms responsible for twinning and disorders of twin gestations have been the subject of considerable interest by physicians and scientists, and cases of atypical twinning have called for a reexamination of the fundamental theories invoked to explain …
The mechanisms responsible for twinning and disorders of twin gestations have been the subject of considerable interest by phy …
Heteropaternity of twins in ring-tailed lemurs (Lemur catta).
Parga JA, Nansen SC. Parga JA, et al. Am J Phys Anthropol. 2019 Jun;169(2):270-278. doi: 10.1002/ajpa.23827. Epub 2019 Apr 5. Am J Phys Anthropol. 2019. PMID: 30951607
RESULTS: All twins were found to be dizygotic, as evidenced by dissimilar multilocus genotypes between the two infants of each twin pair. Heteropaternity was found in 3 of 14 (21% of) twin pairs, whereas the remaining 11 pairs of twins (79%) shared the …
RESULTS: All twins were found to be dizygotic, as evidenced by dissimilar multilocus genotypes between the two infants of each twi
Heritability of the big five personality dimensions and their facets: a twin study.
Jang KL, Livesley WJ, Vernon PA. Jang KL, et al. J Pers. 1996 Sep;64(3):577-91. doi: 10.1111/j.1467-6494.1996.tb00522.x. J Pers. 1996. PMID: 8776880
The genetic and environmental etiology of the five-factor model of personality as measured by the revised NEO Personality Inventory (NEO-PI-R) was assessed using 123 pairs of identical twins and 127 pairs of fraternal twins. Broad genetic influence on the five dimen …
The genetic and environmental etiology of the five-factor model of personality as measured by the revised NEO Personality Inventory (NEO-PI- …
Twins and twinning.
Hall JG. Hall JG. Am J Med Genet. 1996 Jan 22;61(3):202-4. doi: 10.1002/(SICI)1096-8628(19960122)61:3<202::AID-AJMG2>3.0.CO;2-W. Am J Med Genet. 1996. PMID: 8741863 Review. No abstract available.
Elizabeth M. Bryan: tributes from home and abroad; research reviews: anorexia nervosa in opposite-sex twins, twin study of self-esteem, DNA differences in monozygotic twins; twins and more twins: twins living apart, twins playing together, twins working together, twins playing apart, multiple birth odds.
Segal NL. Segal NL. Twin Res Hum Genet. 2008 Jun;11(3):357-61. doi: 10.1375/twin.11.3.357. Twin Res Hum Genet. 2008. PMID: 18498215
This section is followed by reviews of twin research on anorexia nervosa, self-esteem and DNA differences in monozygotic twins. ...An update on current twinning rates follows....
This section is followed by reviews of twin research on anorexia nervosa, self-esteem and DNA differences in monozygotic twins
Prematurity and twinning.
Giuffrè M, Piro E, Corsello G. Giuffrè M, et al. J Matern Fetal Neonatal Med. 2012 Oct;25 Suppl 3:6-10. doi: 10.3109/14767058.2012.712350. J Matern Fetal Neonatal Med. 2012. PMID: 23016610 Review.
Prematurity is the main reason for most neonatal diseases in twins, but other variables may play a role and their prenatal evaluation may improve the overall outcome. MAIN FINDINGS: Prematurity is six times more frequent in twins and therefore birth weight is signif …
Prematurity is the main reason for most neonatal diseases in twins, but other variables may play a role and their prenatal evaluation …
Twins in Ancient Greece: a synopsis.
Malamitsi-Puchner A. Malamitsi-Puchner A. J Matern Fetal Neonatal Med. 2016;29(11):1751-3. doi: 10.3109/14767058.2015.1060958. Epub 2015 Jul 28. J Matern Fetal Neonatal Med. 2016. PMID: 26135766
This brief outline associates twins with several aspects of life in Ancient Greece. In Greek mythology twins caused ambivalent reactions and were believed to have ambivalent feelings for each other. ...In conclusion, in Greek antiquity, twins have been used a …
This brief outline associates twins with several aspects of life in Ancient Greece. In Greek mythology twins caused ambivalent …
Genetic and epigenetic influences of twins on the pathogenesis of craniosynostosis: a meta-analysis.
Lakin GE, Sinkin JC, Chen R, Koltz PF, Girotto JA. Lakin GE, et al. Plast Reconstr Surg. 2012 Apr;129(4):945-954. doi: 10.1097/PRS.0b013e31824422a8. Plast Reconstr Surg. 2012. PMID: 22456364 Review.

Phenotypic variability was present in 62 percent of monozygotic twin sets (p < 0.05). CONCLUSIONS: Increased concordance rates among monozygotic compared with dizygotic twins confirm the genetic role of twins on craniosynostosis. Evidence to support the ep

Phenotypic variability was present in 62 percent of monozygotic twin sets (p < 0.05). CONCLUSIONS: Increased concordance rates amo

Heritability of testis size.
Estourgie-van Burk GF, Bartels M, Delemarre-van de Waal HA, Boomsma DI. Estourgie-van Burk GF, et al. Twin Res Hum Genet. 2009 Aug;12(4):351-5. doi: 10.1375/twin.12.4.351. Twin Res Hum Genet. 2009. PMID: 19653835
We estimated the heritability of human testicular size in a group of mono- and dizygotic twins and their non-twin brothers (145 twins and 20 brothers from 95 families). ...There was significant familial resemblance, with higher correlations in monozygotic …
We estimated the heritability of human testicular size in a group of mono- and dizygotic twins and their non-twin brothers (14 …
Netherlands Twin Register: a focus on longitudinal research.
Boomsma DI, Vink JM, van Beijsterveldt TC, de Geus EJ, Beem AL, Mulder EJ, Derks EM, Riese H, Willemsen GA, Bartels M, van den Berg M, Kupper NH, Polderman TJ, Posthuma D, Rietveld MJ, Stubbe JH, Knol LI, Stroet T, van Baal GC. Boomsma DI, et al. Twin Res. 2002 Oct;5(5):401-6. doi: 10.1375/136905202320906174. Twin Res. 2002. PMID: 12537867 Review.
In 1986 we began The Netherlands Twin Register (NTR) by recruiting young twins and multiples a few weeks or months after birth. ...Sisters who are mothers of DZ twins contribute DNA samples for a linkage study of DZ twinning. ...
In 1986 we began The Netherlands Twin Register (NTR) by recruiting young twins and multiples a few weeks or months after birth …
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