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Vlivy působící na kvalitativní a kvantitativní znaky spermatu kanců
KUČERA, Josef
The aim of the thesis was to evaluate the effects of boar´s genotype (breed or breed combination), season, age and artificial insemination centre on sperm volume, sperm concentration, motility percentage, percentage of abnormal spermatozoa and total number of spermatozoa per ejaculate. The data were collected in 2017 and 2018 from 17 794 collections from 504 boars, 6 to 101 month of age, 6 breeds and 5 breed combinations. The boars were bred in 8 artificial insemination centres in the Czech Republic. Each boar´s genotype produced average sperm volume, sperm volume grew up from spring to autumn and to 4 years of age. Sperm concentration was lower. There were a difference 27 ×103/mm3 (P<0.01) between spring and winter. Boars between 2 to3 years of age had higher sperm concentration (14 ×103/mm3 resp. 15.2 ×103/mm3) than boars less 1 year, resp. 2 to 3 years of age (P<0.01). Sperm motility was at good quality in all genotypes and artificial insemination centres, in all seasons and every age group. Total number of spermatozoa per ejaculate was lower for most genotypes, grew to 4 years of age, there were statistically significant differences between spring and autumn 9 bill.
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Anthropological aspects of male infertility
Sakmárová, Františka ; Novák, Jan (advisor) ; Brynychová, Iva (referee)
Nowadays, more and more couples have had trouble with conceiving a child. Worldwide, around 15 % couples are affected by infertility, while men make up for 20-70 % of this problem. In last decades, the prevalence of the male infertility has been rising globally, with the sperm quality parametres becoming worse. From the view of male infertility etiology, it is rather difficult to pinpoint reasons of this trend. Besides sick individuals whose infertility is caused by genetic or congenital malfunctions or infections, the male infertility affects seemingly healthy individuals as well. The infertility of these objectively healthy (albeit infertile) individuals is from the etiological point of view said to be caused by environmental factors, worst of them being endocrine disruptors, and lifestyle factors, such as obesity, alcohol, smoking and stress. This thesis presents a complex view of male infertility problem, describing both its current state in epidemiology and its changes in time and space. Further on, the thesis is dedicated to the etiology of male infertility, including the lifestyle factors, where anthropology point of view is accentuated. Keywords: male infertility, reproduction, sperm, sperm parameters, causes of male infertility
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