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The effects of temperature on human fertility

Abstract

Monthly birth and temperature data for a variety of states and countries are used to estimate the effect of short-run temperature fluctuations on fertility. Regressions of monthly births on a flexible specification of lagged monthly temperature show that temperature has quantitatively important effects on both seasonal and nonseasonal variation in births. Summer temperature extremes reduce conceptions in the southern United States, explaining a substantial part of the observed seasonal birth pattern. Extreme cold shows no evidence of affecting conceptions. The results also show significant seasonality in births even after accounting for temperature. Controls for monthly temperature do not explain the persistent spring peak in births in northern Europe. This finding suggests that other factors play an important role.

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References

  1. Becker, S. 1981. “Seasonality of Fertility in Matlab, Bangladesh.” Journal of Biological Science 13:97–105.

  2. — 1991. “Seasonal Patterns of Births and Conception throughout the World,” Pp. 59–72 in Temperature and Environmental Effects on the Testis, edited by A.W. Zorgniotti. New York: Plenum.

  3. Becker, S., A. Chowdhury, and H. Leridon (1986). 1986. “Seasonal Patterns of Reproduction in Matlab, Bangladesh.” Population Studies 40:457–72.

  4. Bronson, F.H. 1995. “Seasonal Variation in Human Reproduction: Environmental Factors.” Quarterly Review of Biology 70(2): 141–64.

  5. Chaudhury, R.H. 1972. “Socioeconomic and Seasonal Variations in Births: A Replication.” Social Biology 19:65–68.

  6. Cohen, I.C. and M.B. Bracken 1977. “Monthly Variation in Conceptions Leading to Induced Abortion.” Social Biology 24(3): 245–50.

  7. Ehrenkranz, J.R.L. 1983. “A Gland for all Seasons.” Natural History 6: 18–23.

  8. Karsch, F.J., E.L. Bittman, D.L. Foster, R.L. Goodman, S.J. Legan, and J.E. Robinson. 1984. “Neuroendocrine Basis of Seasonal Reproduction.” Recent Progress in Hormone Research 40: 185–232.

  9. Kestenbaum, B. 1987. “Seasonality of Birth: Two Findings from the Decennial Census.” Social Biology 34(3–4):244–48.

  10. Lam, D.A. and J.A. Miron. 1991. “Seasonality of Births in Human Populations.” Social Biology 38(1–2):51–78.

  11. — 1994. “Global Patterns of Seasonal Variation in Human Fertility.” Pp. 9–28 in Human Reproductive Ecology: Interactions of Environment, Fertility, and Behavior, edited by K.L. Campbell and J.J. Wood. New York: New York Academy of Sciences.

  12. Lam, D.A., J.A. Miron, and A. Riley. 1994. “Modeling Seasonality in Fecundability, Conceptions, and Births.” Demography 31: 321–46.

  13. Lee, R.D. 1981. “Short-Term Variation: Vital Rates, Prices, and Weather.” Pp. 356–401 in The Population History of England, 1541-1871: A Reconstitution, edited by E.A. Wrigley and R. Schofield. Cambridge, MA: Harvard University Press.

  14. Levine, R.J. 1991. “Seasonal Variation in Human Semen Quality.” Pp. 89–96 in Temperature and Environmental Effects on the Testis, edited by A.W. Zorgniotti. New York: Plenum.

  15. — 1994. “Male Factors Contributing to the Seasonality of Human Reproduction.” Pp. 29–45 in Human Reproductive Ecology: Interactions of Environment, Fertility, and Behavior, edited by K.L. Campbell and J.J. Wood. New York: New York Academy of Sciences.

  16. National Oceanic and Atmospheric Administration (NOAA). 1988. State, Regional, and National Monthly and Annual Temperature: Weighted by Area for the Contiguous United States, January 1931-December 1987, Historical Climatology Series 4-1. Asheville, NC: National Climatic Data Center.

  17. iaNational Oceanic and Atmospheric Administration (NOAA). Various dates. Monthly Climatic Data for the World, Various vols. Asheville, NC: National Climatic Data Center.

  18. Pasamanick, B., S. Dinitz, and H. Knobloch. 1960. “Socioeconomic and Seasonal Variations in Birth Rates.” Milbank Memorial Fund Quarterly 38:248–54.

  19. Richards, T. 1983. “Weather, Nutrition, and the Economy: Short-Run Fluctuations in Births, Deaths, and Marriages, France 1740-1909.” Demography 20:197–212.

  20. Roenneberg, T. and J. Aschoff. 1990a. “Annual Rhythm of Human Reproduction: 1. Biology, Sociology, or Both?” Journal of Biological Rhythms 5:195–216.

  21. — 1990b. “Annual Rhythm of Human Reproduction: II. Environmental Correlations.” Journal of Biological Rhythms 5:217–39.

  22. Seiver, D. 1985. “Trend and Variation in the Seasonality of U.S. Fertility, 1947 to 1976.” Demography 22:89–100.

  23. — 1989. “Seasonality of Fertility: New Evidence.” Population and Environment 10(4):245–57.

  24. Stoeckel, J. and A.K.M.A. Chowdhury. 1972. “Seasonal Variation in Births in Rural East Pakistan.” Journal of Biosocial Science 4:107–16.

  25. Sundaraj, N., M. Chern, L. Gatewood, L. Hickman, and R. MeHugh. 1978. “Seasonal Behavior of Human Menstrual Cycles: A Biometric Investigation.” Human Biology 50(1):15–31.

  26. Udry, J.R. and N.M. Morris. 1967. “Seasonality of Coitus and Seasonality of Birth.” Demography 4:673–79.

  27. Warren, C.W. and C.W. Tyler. 1979. “Social Status and Season of Birth: A Study of a Metropolitan Area in the Southeastern United States.” Social Biology 26:275–88.

  28. Warren, C.W., M.L. Gwinn, and G.L. Rubin. 1986. “Seasonal Variation in Conception and Various Pregnancy Outcomes.” Social Biology 33(1–2):116–26.

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Correspondence to David A. Lam.

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Lam, D.A., Miron, J.A. The effects of temperature on human fertility. Demography 33, 291–305 (1996) doi:10.2307/2061762

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Keywords

  • Seasonal Pattern
  • Monthly Temperature
  • Seasonal Birth
  • Spring Peak
  • Human Fertility