Hostname: page-component-cd9895bd7-lnqnp Total loading time: 0 Render date: 2024-12-26T00:48:03.824Z Has data issue: false hasContentIssue false
  • English
  • Français

Investigation on Seasonality of Twin Births in Brazil

Published online by Cambridge University Press:  01 August 2014

H. Krieger ,
G. M. D. D. Colletto ,
C. Franchi-Pinto  and
B. Beiguelman
H. Krieger
Affiliation:
Department of Parasitology, University of Sāo Paulo, S. Paulo, SP, Brazil
G. M. D. D. Colletto
Affiliation:
Department of Parasitology, University of Sāo Paulo, S. Paulo, SP, Brazil
C. Franchi-Pinto
Affiliation:
Department of Medical Genetics, School of Medicine, UNICAMP, Campinas, SP, Brazil
B. Beiguelman*
Affiliation:
Department of Medical Genetics, School of Medicine, UNICAMP, Campinas, SP, Brazil
*
Departamento de Genética Médica, Faculdade de Ciências Médicas, C.P. 6111, UNICAMP, 13081-970 Campinas, SP, Brazil.

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The hypothesis of seasonality of twin births was investigated in two important maternity hospitals in the State of Sāo Paulo, Brazil. The study included 1,386 twin births that occurred among 154,699 deliveries from 1984 to 1993. No evidence of seasonality has been detected either for the twin birth rate considered as a whole or for dizygotic twinning rate. The distributions of these rates fitted well sinusoidal regression curves but the cyclic trend did not correspond to any specific season.

Keywords

SeasonalityPeriodicityCyclic variationTwin birthsDizygotic rateTwin births in southeastern Brazil
Type
Research Article
Information
Acta geneticae medicae et gemellologiae: twin research , Volume 45 , Issue 4 , October 1996 , pp. 397 - 403
Copyright
Copyright © The International Society for Twin Studies 1996

References

REFERENCES

1. Beiguelman, B, Villarroel-Herrera, HO (1992): Seasonal variation in twin birth rates in Brazil. Rev Brasil Genet 15: 703–706.Google Scholar
2. Belitzky, R, Fescina, R, Ucieda, F (1978): Definiciones y terminologia aplicables al periodo perinatal. Recomendaciones de la Organización Mundial de la Salud y Modificaciones de la FIGO. Publicación Científica del CLAP No. 757: 136–147.Google Scholar
3. Bonnelykke, B, Sogaard, J, Nielsen, J (1987): Seasonality in twin birth rates, Denmark, 1936-84. J Epidemiol Community 41: 338–343.Google Scholar
4. Czeizel, A (1974): Unexplainable demographic phenomena of multiple births in Hungary. Acta Genet Med Gemellol 22 (Suppl.): 214–218.Google Scholar
5. Edwards, J (1938): Season and rate of conception. Nature 142: 357.Google Scholar
6. Elwood, JM (1978): Maternal and environmental factors affecting twin births in Canadian cities. Br J Obstet Gynecol 85: 351–358, 1978.CrossRefGoogle ScholarPubMed
7. Erhard, CL, Nelson, FG, Pakter, J (1971): Seasonal patterns of conception in New York City. Am J Publ Health 61: 2246–2258.Google Scholar
8. Gedda, L (1994): Twin study today. Acta Genet Med Gemellol 43: 3–15, 1994.Google Scholar
9. Gedda, L, Brenci, G, Carrega, R (1989): Seasonality in twins vs. single births. Abstracts, Sixth Int. Cong Twin Studies, Acta Genet Med Gemellol 38 (1–2): 131.Google Scholar
10. Imaizumi, Y (1992): Twinning rates in Japan 1951-1990. Acta Genet Med Gemellol 41: 165–175.Google Scholar
11. Imaizumi, Y, Asaka, A, Inouye, E (1980): Analysis of multiple birth rates in Japan. V. Seasonal and social class variations in twin births. Jap J Human Genet 25: 299–307.Google Scholar
12. James, WH (1976) Seasonality and twin births. Ann Hum Biol 3: 193–195.Google Scholar
13. James, WH (1980): Seasonality in twin and triplet births. Ann Hum Biol 7: 163–175.Google Scholar
14. Kamimura, K (1976): Epidemiology of twin births from a climatic point of view. Br J Prev Soc Med 30: 175–179.Google Scholar
15. Nonaka, K, Miura, T (1987): Incidence of twinning in London from 1581 to 1760. Acta Genet Med Gemellol 36: 365–372 Google ScholarPubMed
16. Nonaka, K, Miura, T, Peter, K (1989): Seasonal effects on twinning in a fertile population, the Hutterites. Abstracts, Sixth Int. Cong. Twin Studies, Acta Genet Med Gemellol 38 (1–2): I 12–113.Google Scholar
17. Nylander, PPS (1981): The factors that influence twinning rates. Acta Genet Med Gemellol 30: 189–202.Google ScholarPubMed
18. Picard, R, Fraser, D, Hagay, ZJ, Leiberman, JR (1990): Twinning in Israel. Seasonal variation effects of ethnicity, maternal age and parity. J Reprod Med 35: 163–167.Google Scholar
19. Richter, J, Miura, T, Nakamura, I, Nonaka, K (1984): Twinning rates and seasonal changes in Görlitz, Germany, from 1611 to 1860. Acta Genet Med Gemellol 33: 121–124.Google Scholar
20. Selvin, S, Janerich, DT (1972): Seasonal variation in twin births. Nature 237: 289–290.Google Scholar
21. Timonen, S, Carper, E (1968): Multiple pregnancies and photoperiodicity. Ann Chir Gynaecol Fenn 57: 135–138.Google Scholar
22. Weinberg, W (1901): Beiträge zur Physiologie und Pathologie der Mehrlingsgeburten beim Menschen. Pflügers Arch. Ges. Physiol. 88: 346–430.CrossRefGoogle Scholar
23. Zahalkova, M (1974): Multiple births in Southern Moravia. Acta Genet Med Gemellol 22 (Suppl.): 210–213.Google Scholar