| Summary: | The study objective is to investigate the effects of exogenic and endogenic factors on the main morphological and functional characteristics of the sperm.Materials and methods. In total, 107 men were under observation, 77 of which sought medical help due to infertility in marriage; 30 men with proven normalfertility constituted the control group. The effect of somatotype, activity type, profession, lifestyle, harmful habits, as well as age and physiological characteristics on morphological and functional characteristics of the sperm were studied.Results. In men with excessive body weight, the ejaculate volume is lower than the normal value (<1.5 ml). In men older than 35 years, functional activity of the sperm is significantly lower. All of the studied characteristics were higher in men participating in intellectual labor compared to men participating in manual labor.Conclusion. Body mass index, age and activity type affect male fertility.
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