Skip to main content

Social class and human twinning

  • Birgitte Bønnelykke (a1)

In a comparative study to examine the effect of social factors on human twinning, data on sociodemographic and other factors were collected from parents of all twins born alive in Denmark in 1984 or 1985 and from a random sample of parents of singleton infants born in the same years. A postal questionnaire was used. The twins were classified as monozygotic (MZ) or dizygotic (DZ) twins by the similarity method. A trend was found in DZ-twinning, with significantly fewer DZ-twins born in the lower social classes, but not in MZ-twinning. All results were controlled for maternal age and parity.

Hide All
Anderson, W. J. R. (1956) Stillbirth and neonatal mortality in twin pregnancy. J. Obstet. Gynaec. Br. Emp. 63, 205.
Armitage, P. (1971) Statistical Methods in Medical Research. Blackwell, Oxford.
Bishop, Y. M. M., Feinberg, S. E., Holland, P. W. (1975) Discrete Multivariable Analyses: Theory and Practice. MIT Press, Cambridge, Massachusetts.
Bønnelykke, B., Olsen, J. & Nielsen, J. (1990) Coital frequency and twinning. J. biosoc. Sci. 22, 193.
Campbell, D. M., Campbell, A. J. & MacGillivray, I. (1974) Maternal characteristics of women having twin pregnancies. J. biosoc. Sci. 6, 463.
Corney, G., Seedburgh, D., Thompson, B., Campbell, D. M., MacGillivray, I. & Timlin, D.(1979) Maternal height and twinning. Ann. hum. Genet. 43, 55.
Elwood, J. M. (1973) Changes in the twinning rate in Canada 1926–70. Br. J. prev. soc. Med. 27,236.
Hansen, E. J. (1984) Socialgrupper i Danmark. SFI Studie 48, Socialforskningsinstituttet, Copenhagen.
Hemon, D., Berger, C., Lazar, P. (1979) The etiology of human dizygotic twinning with special reference to spontaneous abortions. Acta Genet. med. Gemell. 28, 253.
James, W. H. (1972) Secular changes in dizygotic twinning rates. J. biosoc. Sci. 4, 427.
Jeanneret, O. & McMahon, B. (1962) Secular changes in rates of multiple births in the United States. Am. J. hum. Genet. 14, 410.
Lilienfeld, A. M. & Pasamanick, B. (1955) A study of variations in the frequency of twin births by race and socioeconomic status. Am. J. hum. Genet. 7, 204.
McArthur, J. W. (1942) Relations of body size to litter size and to the incidence of fraternal twins.J. Hered. 33, 87.
Nielsen, J., Homma, A., Isaksen, B. & Bertelsen, A. (1978) Incidence of twin births in Denmark from 1911 to 1974. Acta Genet. med. Gemell. 27, 45.
Nylander, P. P. S. (1981) The factors that influence twinning rates. Acta Genet. med. Gemell. 30,189.
Rachootin, P. & Olsen, J. (1980) Secular changes in the twinning rate in Denmark 1931 to 1977.Scand. J. Social Med. 8, 89.
Smith, A. (1974) Observations on the Determinants of Human Multiple Birth. Annual Report of the Registrar General for Scotland. Edinburgh.
Torgersen, J. (1951) Hereditary and environmental factors in twinning. Am. J. phys. Anthrop. 9,441.
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Journal of Biosocial Science
  • ISSN: 0021-9320
  • EISSN: 1469-7599
  • URL: /core/journals/journal-of-biosocial-science
Please enter your name
Please enter a valid email address
Who would you like to send this to? *

Related content

Powered by UNSILO


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed