Abstract
In regions with warm climates the birth rate is reduced during the spring season1–3. Could summer heat nine months earlier have caused semen quality to deteriorate and diminish the rate of conception? Human testes and epididymides, carried in the scrotal sac, are more likely to be influenced by environmental temperatures than are female reproductive organs, located inside the pelvic cavity and protected by the full complement of the body’s homeostatic mechanisms4. Even mild scrotal warming after two to three weeks can temporarily reduce both concentration and number of sperm in ejaculates5. A decrease in the frequency of sexual intercourse might account for a diminished rate of conception during summer, but the available evidence suggests, if anything, that the opposite may occur4,6–8.
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References
Huntington, E. Season of Birth: Its Relation to Human Abilities. John Wiley &Sons, New York (1938)
Rosenberg, H.M. Seasonal variation of births: United States, 1933–63. Vital and Health Statistics, Series 21, Number 9, National Center for Health Statistics. U.S. Department of Health, Education, and Welfare, Washington, DC, (May 1966)
Becker, S. Seasonality of fertility in Matlab, Bangladesh.J. Biosoc. Sci., 13:97–105 (1981)
Levine, R.J., Bordson, B.L., Mathew, R.M., Brown, M.H., Stanley, J.M. and Starr, T.B. Deterioration of semen quality during summer in New Orleans.Fert. Steril., 49:900–07 (1988)
Robinson, D. and Rock, J. Intrascrotal hyperthermia induced by scrotal insulation: effect on spermatogenesis.Obstet. Gvnecol., 29:217–23 (1967)
Becker, S., Chowdhury, A., Leridon, H. Seasonal patterns of reproduction in Matlab, Bangladesh.Popul. Stud., 40:457–72 (1986)
Udry, J.R. and Morris, N.M. Seasonality of coitus and seasonality of birth.Demography. 4:673–79 (1967)
Ehrenkranz, J.R.L. Seasonal breeding in humans: birth records of the Labrador Eskimo.Fert. Steril., 40:485–89 (1983)
Hotchkiss, R.S. Factors in stability and variability of semen specimens: observations on 640 successive samples from 23 men.J. Urol., 45:875–88 (1941)
MacLeod, J. and Heim, L.M. Characteristics and variations in semen specimens in 100 normal young men.J. Urol., 54:474–482 (1945)
Tjoa, W.S., Smolensky, M.H., Hsi, B.P., Steinberger, E. and Smith, K.D. Circannual rhythm in human sperm count revealed by serially independent sampling.Fert. Steri l.,38:454–59 (1982)
Mortimer, D., Templeton, A.A., Lenton, E.A. and Coleman, R.A. Annual patterns of human sperm production and semen quality.Arch. Androl., 10:1–5 (1983)
Spira, A. Seasonal variations of sperm characteristics.Arch. Androl., 12(Suppl):23–28 (1984)
Saint Pol, P., Beuscart, R., Leroy-Martin, B., Hermand, E. and Jablonski, W. Circannual rhythms of sperm parameters of fertile men.Fert. Steril., 51:1030–33 (1989)
Politoff, L., Birkhauser, M., Almendral, A. and Zorn, A. New data confirming a circannual rhythm in spermatogenesis.Fert. Steril., 52:486–89 (1989)
Levine, R.J., Brown, M.H., Mathew, R.M., Pattinson, H.A. and Mortimer, D. Seasonal variation in semen quality at a Calgary fertility clinic (in preparation, 1990).
Baker, H.W.G., Burger, H.G., de Kretser, D.M., Lording, D.W., McGowan, P. and Rennie, G.C. Factors affecting the variability of semen analysis results in infertile men.Int. J. Androl., 4:609–22 (1981)
Abbaticchio, G., de Fini, M., Giagulli, V.A., Santoro, G., Vendola, G. and Giorgino, R. Circannual rhythms in reproductive functions of human males: correlations among hormones and hormone-dependent parameters.Andrologia. 19:353–61 (1987)
Reinberg, A., Smolensky, M.H., Hallek, M., Smith, K.D. and Steinberger, E. Annual variation in semen characteristics and plasma hormone levels in men undergoing vasectomy.Fert. Steril., 49:309–15 (1988)
Schrader, S.M., Turner, T.W., Breitenstein, M.J. and Simon, S.D. Longitudinal study of semen quality of unexposed workers: I. Study Overview.Repro. Toxicol., 2:183–90 (1988)
Cowgill, U.M. Season of birth in man: contemporary situation with special reference to Europe and the southern hemisphere.Ecology. 47:614–623 (1965)
Ashley, M.J. Season of birth: stability of the pattern in Canada.Can. J. Pub. Hea lth.79:101–03 (1988)
Ehrenkranz, J.R.L. Seasonal breeding in humans: birth records of the Labrador Eskimo.Fert. Steri l., 40:485–89 (1983)
Abas, W. and Murphy, D. Seasonal affective disorder: the miseries of long dark nights?Br. Med. J., 295:1504–05 (1987)
Heuchel, V., Schwartz, D. and Price, W. Within-subject variability and the importance of abstinence period for sperm count, semen volume and pre-freeze and post-thaw motility.Androloeia, 13:479–85 (1981)
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© 1991 Plenum Press, New York
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Levine, R.J. (1991). Seasonal Variation in Human Semen Quality. In: Zorgniotti, A.W. (eds) Temperature and Environmental Effects on the Testis. Advances in Experimental Medicine and Biology, vol 286. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-5913-5_8
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DOI: https://doi.org/10.1007/978-1-4684-5913-5_8
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