Clinical and Experimental Reproductive Medicine

The Korean Society for Reproductive Medicine (대한생식의학회)
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Monthly variations in semen parameters in a Sri Lankan population undergoing fertility evaluation

  • Anura Dissanayake (Reproductive Medicine Unit, Department of Obstetrics and Gynecology, Faculty of Medicine, University of Kelaniya)
  • Received : 2023.05.31
  • Accepted : 2023.09.21
  • Published : 2024.06.30
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Abstract

Objective: Seasonal variations in semen quality are known to occur in temperate regions, but results regarding tropical areas remain inconclusive. The aim of this study was to determine whether monthly variations in semen parameters are present among men in a tropical region. Methods: Data were retrospectively collected from semen analyses of 3,000 men over a 10-year period, from 2012 to 2022. Analysis of variance and the independent-samples t-test were employed to observe variations in semen parameters throughout the entire period and between months, respectively. Results: The mean±standard deviation sperm concentration was significantly lower in June, at 42.5±31.4 million/mL, compared to other months. The highest sperm concentration was found in March, at 57.8±42.6 million/mL, constituting a mean difference of 15.3 million/mL between the lowest and highest concentrations. The total sperm count displayed a similar pattern of monthly variation, with a difference of 47.2 million between the highest and lowest months. No significant monthly differences were observed in other parameters, such as sperm motility, morphology, and semen volume. Conclusion: Significant monthly variations in sperm concentration and total sperm count were evident in this Sri Lankan population. March, which displayed the highest sperm counts, is in the spring in temperate regions, while the month with the lowest counts, July, is part of the summer. Fluctuations in photoperiod appear to most strongly influence these variations.

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References

  1. Valeanu S, Johannisson A, Lundeheim N, Morrell JM. Seasonal variation in sperm quality parameters in Swedish red dairy bulls used for artificial insemination. Livest Sci 2015;173:111-8.  https://doi.org/10.1016/j.livsci.2014.12.005
  2. Petrocelli H, Batista C, Gosalvez J. Seasonal variation in sperm characteristics of boars in southern Uruguay. Rev Bras Zootec 2015;44:1-7.  https://doi.org/10.1590/S1806-92902015000100001
  3. Kridli RT, Tabbaa MJ, Barakeh FS. Seasonal variation in scrotal circumference and semen characteristics of Black Bedouin and Black Bedouin-Damascus crossbred bucks. Asian-Australas J Anim Sci 2007;20:359-64.  https://doi.org/10.5713/ajas.2007.359
  4. Karagiannidis A, Varsakeli S, Alexopoulos C, Amarantidis II. Seasonal variation in semen characteristics of Chios and Friesian rams in Greece. Small Rumin Res 2000;37:125-30.  https://doi.org/10.1016/S0921-4488(99)00143-1
  5. Zamboni L, Conaway CH, Van Pelt L. Seasonal changes in production of semen in free-ranging rhesus monkey. Biol Reprod 1974;11:251-67.  https://doi.org/10.1095/biolreprod11.3.251
  6. Erb RE, Andrews FN, Hilton JH. Seasonal variation in semen quality of the dairy bull. J Dairy Sci 1942;25:815-26.  https://doi.org/10.3168/jds.S0022-0302(42)95343-8
  7. Levine RJ. Seasonal variation of semen quality and fertility. Scand J Work Environ Health 1999;25 Suppl 1:34-7. 
  8. Zasiadczyk L, Fraser L, Kordan W, Wasilewska K. Individual and seasonal variations in the quality of fractionated boar ejaculates. Theriogenology 2015;83:1287-303.  https://doi.org/10.1016/j.theriogenology.2015.01.015
  9. Parkinson TJ. Seasonal variation in semen quality of bulls and correlations with metabolic and endocrine parameters. Vet Rec 1985;117:303-7.  https://doi.org/10.1136/vr.117.12.303
  10. Alam SS, El Makawy AI, Tohamy AA, Abd Elrahman MM. Effect of seasonal variations on semen quality and fertility of Egyptian water buffalo (Bubalus bubalis) bulls. Res J Pharm Biol Chem Sci 2015;6:1059-69. 
  11. Casao A, Cebrian I, Asumpcao ME, Perez-Pe R, Abecia JA, Forcada F, et al. Seasonal variations of melatonin in ram seminal plasma are correlated to those of testosterone and antioxidant enzymes. Reprod Biol Endocrinol 2010;8:59. 
  12. Cagnacci A, Maxia N, Volpe A. Diurnal variation of semen quality in human males. Hum Reprod 1999;14:106-9.  https://doi.org/10.1093/humrep/14.1.106
  13. Kunzle R, Mueller MD, Huber AW, Drescher H, Bersinger NA. Seasonality in human semen quality of smokers and non-smokers: effect of temperature. Asian J Androl 2004;6:243-7. 
  14. Chen Z, Toth T, Godfrey-Bailey L, Mercedat N, Schiff I, Hauser R. Seasonal variation and age-related changes in human semen parameters. J Androl 2003;24:226-31.  https://doi.org/10.1002/j.1939-4640.2003.tb02666.x
  15. De Giorgi A, Volpi R, Tiseo R, Pala M, Manfredini R, Fabbian F. Seasonal variation of human semen parameters: a retrospective study in Italy. Chronobiol Int 2015;32:711-6.  https://doi.org/10.3109/07420528.2015.1024315
  16. Levitas E, Lunenfeld E, Weisz N, Friger M, Har-Vardi I. Seasonal variations of human sperm cells among 6455 semen samples: a plausible explanation of a seasonal birth pattern. Am J Obstet Gynecol 2013;208:406. 
  17. Chen Z, Godfrey-Bailey L, Schiff I, Hauser R. Impact of seasonal variation, age and smoking status on human semen parameters: The Massachusetts General Hospital experience. J Exp Clin Assist Reprod 2004;1:2. 
  18. Chia SE, Lim ST, Ho LM, Tay SK. Monthly variation in human semen quality in male partners of infertile women in the tropics. Hum Reprod 2001;16:277-81.  https://doi.org/10.1093/humrep/16.2.277
  19. World Health Organization. WHO laboratory manual for the examination and processing of human semen. 5th ed. WHO Press; 2010. 
  20. Politoff L, Birkhauser M, Almendral A, Zorn A. New data confirming a circannual rhythm in spermatogenesis. Fertil Steril 1989;52:486-9.  https://doi.org/10.1016/S0015-0282(16)60923-8
  21. Yogev L, Kleiman S, Shabtai E, Botchan A, Gamzu R, Paz G, et al. Seasonal variations in pre- and post-thaw donor sperm quality. Hum Reprod 2004;19:880-5.  https://doi.org/10.1093/humrep/deh165
  22. Henkel R, Menkveld R, Kleinhappl M, Schill WB. Seasonal changes in human sperm chromatin condensation. J Assist Reprod Genet 2001;18:371-7.  https://doi.org/10.1023/A:1016618405570
  23. Zhang XZ, Liu JH, Sheng HQ, Wu HJ, Wu Y, Yao KS, et al. Seasonal variation in semen quality in China. Andrology 2013;1:639-43. https://doi.org/10.1111/j.2047-2927.2013.00092.x