The prevalence of social risk factors for the development of male infertility: smoking, alcohol and narcotic use in men from infertile couples, the influence of the “northern type” of alcohol consumption on ejaculate indicators

Introduction. Lifestyle factors, including smoking, alcohol (AU) and drug use (DU), can affect male fertility. The aim of the study was to investigate the frequency and characteristics of smoking, AU and DU in men from infertile couples, to identify the most significant associations of disorders of spermatogenesis and social risk factors.
Material and methods. At the 1st stage of the study, the case histories of 1198 men from infertile couples were analyzed to determine the frequency of smoking, AU and DU, at the 2nd stage, a more detailed questionnaire of 239 patients from the general sample was conducted for detailed characteristics of smoking and/or AU and/or DU, at the 3rd stage, a comprehensive analysis of ejaculate from men who consumed strong alcohol, but did not smoke or use DU (n = 46) was performed in comparison with men without bad habits taken into account (n = 60).
Results. In the general sample, the frequency of AU was 73 %, smoking – 41 %, DU –17 % (mostly in anamnesis). 47.9 % of AU men consumed beer (1.5 (1–2.5) liters per week, 25.6 % – strong alcohol (250 (100–500) ml per week), 7.6 % – champagne/wine (500 (250–725) ml per week); 92.7 % of smokers used cigarettes, 7.3 % – electronic cigarettes (smoking experience was 15 (10–20) years, the number of cigarettes per day was 15 (10–20) pieces); more than 90 % of DU men have a history of non-injection DU. Men who consumed only strong alcohol, but did not smoke and did not use drugs, increased sperm DNA fragmentation compared to men without bad habits taken into account: 16.0 (13.5–19.6) and 12.8 (8.8–19.4) %, respectively, p = 0.018.
Conclusions. Among men from infertile couples, a high frequency of AU was revealed with the predominant use of beer or strong alcohol, the use of the latter increases sperm DNA fragmentation; smoking is characterized by a long experience; active DU is rare. Given the specifics of the requirements for the state of reproductive health of men applying to reproductive medicine centers, it is important to have knowledge about the frequency and severity of smoking, AU and DU among them, as well as about the relationship of risk factors of infertility with the parameters of ejaculate.

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