7
Views
16
CrossRef citations to date
0
Altmetric
Original Article

Secular changes in twinning rates in England and Wales

Pages 485-487 | Received 21 Apr 1980, Published online: 09 Jul 2009

References

  • Bulmer M.G. The Biology of Twinning in Man. Clarendon Press, Oxford 1970
  • Czeizel A., Acsadi G. Demographic characteristics of multiple births in Hungary. Acta Genetica Medicae et Gemellologiae 1971; 20: 301–313
  • Elwood J.M. Changes in the twinning rate in Canada 1926–1970. British Journal of Preventive and Social Medicine 1973; 27: 236–241
  • Hoogendoorn D. Daling van het aantal meerlinggeboorten. Nederlands Tijdschrift voor Geneeskunde 1973; 117: 805–807
  • James W.H. Secular changes in dizygotic twinning. Journal of Biosocial Science 1972; 4: 427–434
  • James W.H. The secular decline in dizygotic twinning rates in Italy. Acta Geneticae Medicae et Gemellologiae 1975; 24: 9–14
  • James W.H. A hypothesis on the declining dizygotic twinning rates in developed countries. Progress in Clinical and Biological Research 1978; 24B: 81–88
  • James W.H. Secular trend in reported sperm counts. Andrologia 1980, (in the press)
  • Krueger J., Propping P. Twinning frequencies in Baden-Wurttemberg according to maternal age and parity from 1955–72. Acta Geneticae Medicae et Gemellologiae 1976; 25: 36–40
  • Piasecki E. The frequency of twin births in Poland. Studia Demograficzne 1978; 54: 53–66, (in Polish)
  • Rola-Janicki, A. Multiple births in Poland, 1949–1971. ‘Multiple Births and Twin Care’, Acta Geneticae Medicae et Gemellologiae, P. Parisi, 1974, In, Supplement 22
  • Syrovátka A., Havránek F., Vondráček J. Changes in the incidence of twin births in Czechoslovakia. Ceskoslovenská Pediatrie 1979; 34: 434–437, (in Czech)
  • Tabutin D. Quelques données sur les accouchements multiples en Belgique. Population et Famille 1977; 40: 1–20

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.