Marriage duration specific fertility trends Abstract The aim of this Master thesis is to describe the development of the marital fertility in the Czech Republic with focus on the analysis of the period between the marriage and the birth of child of a given order in the current marriage. It shows trends in the marital fertility in the time period between 1974 and 2011from transverse and longitudinal view. Using selected indicators the thesis describes different development of the marital fertility in the given period, which is closely connected with the distinct social and demographic situation in the Czech Republic prior and after the year 1989. In the whole monitored period the number of marriages is decreasing significantly. There was a significant increase both in a number and ratio of the children born alive outside of marriage, and on the opposite, decrease in the number and ratio of children born alive within the marriage. Within the framework of the current marriages substantial changes of the reproductive behavior occurred with an obvious breaking point in 1989. Since that time significant decrease in number of children, both in total and in the number of children of a given order has started. At the same time significant prolongation of the period between the start of marriage and birth of a child...

Time use dependent on presence of children in household for generation 40s to 70s of the 20th century in the United States of America Abstract: The fertility of women has declined under reproduction level 2.1 children per women in economic developed countries during the last few decades. At the same time the employment of women has risen and time use has changed. Main aim of this thesis is to understand how generations born in 1940-1979 living in the USA changed the spending of their time. The AHTUS data set is analysed by comparing averages of times spent by total work, paid work, unpaid work and child care. The time spent by total work declined between generations born at 40s and 70s. Average time spent by paid work declined too. The men's average time spent by unpaid work increased and women's average time decreased. In spite of fertility decrease between 40s and 70s generations, the women's and men's time spent by childcare extremely increased. The men's time spent by child care increased five times, while women's time spent by child care increased more than three times. The rise of time spent by child care is realized by increasing in primary and secondary activities. Primary activities contain time spent by childcare, secondary activities include all activities where childcare was declared e as a...

Population policy in China Abstract This thesis concerns the topic of population policy in China, focusing on the one-child policy. It describes the development of these policies and then deals with the research questions themselves. First of all the thesis describes the process of the fertility decrease in China in connection with the population policy since the 50s of the 20th century. This part of the thesis results in the findings that the largest fertility decrease occurred in the 70s of the 20th century as a consequence of the population policy measures. It was even before the implementation of the one-child policy in 1979, even though this also had a significant impact on the fertility. The one-child policy, amongst low fertility, has also brought some negative effects including accelerated demographic aging, increased sex ratio at birth, the phenomenon of "little emperors", more difficult situation for parents who lost their only child, etc. The thesis also compares the population policy of China and other Asian countries with similar trends in fertility. This part of the thesis results in the finding that similar fertility limitation can be handled by a milder way than it was in the case of China. Keywords: China, population policy, fertility, one-child policy

This thesis provides an overview of the literature on reproduction attributes of the Holstein Friesian cattle and its influence on the cattle reproductive indices. One of the goals was to evaluate the influence of selected factors on the reproduction indices for a pre-selected group of dairy cattles. The data has been processed and sorted by the lactation production levels, daily production, order of lactation and the age of the first calving. The data about the used bulls has been processed as well. Another goal of the thesis was acquisition of the data about excluded cows. For the excluded cows, the age, order of lactation, reason for exclusion and life-long production have been recorded. The data for the thesis have been obtained from the production control records and database of breeds in the selected Holstein cattle breeding. The dairy cattles, which got in calf during the years 2017 and 2018 have been evaluated. In particular, for 2017 and 2018, the evaluation was carried out on 190 and 229 dairy cattles respectively, which makes the total of 419 evaluated cows. For those dairy cows, the insemination index data, insemination interval, gestation after first insemination, service period and gestation period has been recovered from the zootechnical register. The evaluation of excluded dairy cows contained 339 dairy cows, which have been excluded during years 2017 and 2018. For the evaluation of the used bulls, the total count and description of how the bull for insemination have been selected is provided. Evaluation the influence of level of lactation production on the reproduction indices has shown a significant (p0,05) statistical relation between production levels and duration of the service period. It has also been proven that this has an influence on the insemination index levels. The lowest values (p0,05) of service period and insemination index have been detected for dairy cattles with production up to 6 999 kg. On the other hand, the highest values of service period and insemination index have been recorded for the dairy cattles with production up to 9 000 kg (p0,05). The influence of daily dairy production levels on the reproduction indices have been evaluated as well. It can be clearly seen from the results that as the daily dairy production increases, the service period increases as well. The lowest values (p0,05) of the service period was recorded for breeds, who had the daily production levels up to 24.99 kg. Opposed to that, the highest values of service period have been recorded for dairy cattles with average daily milk production over 30 kg. The evaluation of order of lactation on the reproduction indices did not show any significant statistical results (p0,05). Furthermore, during the evaluation of first calving, no statistically significant differences have been shown (p0,05). Last reproduction index we have evaluated was gestation after the first insemination. The groups were divided by the production levels, daily milk production, order of lactation and age of the first calving. For each group, the percentage of cattles that got in calf after first insemination has been computed. On average, this value was 36.28%.

The aim of the diploma thesis was to evaluate reproduction indicators (percentage of pregnancy, fertility, intensity, total rearing, reactivity, rearing of lambs born and total lamb mortality), their comparison over the years and the average in the Czech Republic. The influence of the age of the mother on fertility and the proportion of sheep according to the frequency of litters was also evaluated. Monitoring was carried out in breeding sheep clun forest (at 30 ewes) at Studnice farm from 2015 - 2018. In the monitored reproduction indicators, there was a statistically significant effect (P 0,01) only in the fertility of the herd in question for the period 2015 - 2018. This was caused by higher fertility differences in the first two years on average by 10% between selected breeding and average in the Czech Republic . For the past two years, fertility was on average 25% lower than the national average. When assessing the effect of maternal age on fertility, the highest fertility rates were in three-year-old (174%) and four-year-old sheep (168%). The effect on the highest fertility rates was the highest number of lambs born (about 2 lambs per sheep). Since the third year of age fertility has fallen until the fifth year. Then there was a slight increase (the number of born lambs in the sheep (1.5 lambs) increased) and the lowest fertility (133%) was found in seven-year-old and older sheep, when the number of lambs was also decreasing. Based on the above data on the effect of age on fertility, a statistically highly significant effect (P 0,01) was observed in the observed breeding for the years 2015 - 2018.

The work deals with the evaluation of selected effects on reproduction of Holstein cattle breeds. The aim of the study was to evaluate reproductive parameters (insemination index, insemination interval, period service, interim, pregnancy after the first insemination) in a selected group of dairy cows. These reproductive indicators were subsequently evaluated depending on genotype, performance level, lactation order and age at first calving and used synchronization methods. The evaluation took place at the Vřesce farm, belonging to company Rynagro a.s. 260 Holstein breed cows and their hybrids were included. The results showed that some reproductive indicators (insemination interval, service period and interim) of the monitored group of dairy cows were lower than the average of the Czech Republic. When evaluating the genotype effect on reproductive parameters, a highly significant effect (p<0.01) of genotype on insemination interval was found. Holstein breed cows had a 7-day higher insemination interval than other crosses. In evaluating the effect of daily milk yield was not proven statistically significant differences (p>0.05) in period servis and interim. Statistically significant differences (p<0.05) in insemination index, insemination interval and pregnancy after the first insemination were proven in the performance evaluation. The p-value of the global null hypothesis was close to 0.05 and no significant differences between the compared groups were demonstrated in the subsequent multiple comparison. The effect of the order of lactation on reproductive parameters was not proven (p>0.05). However, interesting results were found by the impact of age at first calving. There was a statistically highly significant difference (p<0.01) between the groups in the insemination interval and the interim and a statistically significant difference (p<0.05) between the groups in the service period. Cows with a first calving age 23 months had all of these indicators lowest, the highest values were found within cows with a first calving age of 28 months. After evaluating the correlation analysis, a significant effect of age at first calving on insemination interval (p<0.05; r=0.13), on interim (p<0.01; r=0.17) and period service (p<0.01; r=0.17). Synchronization methods were used in 125 cows and the overall success rate after this treatment was 47%. The most commonly used protocol was the Ovsynch method. The calculations based on the extension of the service period quantified the theoretical loss for the extended cycle of dairy cows. This loss is 7 030, - CZK per cow and takes into account the losses for milk and the unborn calf, not the cost of further insemination and treatment of cows.

This thesis focuses on childlesness in lifestyle concept. The aim of the thesis is to characterize the lifestyle of childless respondents. The work describes the various lifestyle related factors and reproductive plans. Comprehensive analysis is processed using logistic regression and determines how much a given factors affects repro- ductive plans and ultimate childlessness. Key words: childlesness, life style, fertility, reproductive behaviour 1

The impact of religion on reproductive behaviour Abstract Religion is one of the reproductive behaviour determinants examined in literature. The aim of this thesis is to find a relation between religion, religiosity and a level of fertility. Using the method of Poisson regression, the thesis analyses data from "European Value Study" comparing the Czech Republic, Italy, Germany and Poland and data from research "Detraditionalitization and individualization of religion in the Czech Republic in 2006". Using literature, established hypotheses assume a higher level of fertility among religiously active population. Affiliation with a denomination, frequency of church service visits, importance of religion in life, demographic and socioeconomic indicators are used as variables. Part of the thesis is devoted to a qualitative researched focused on young believers with academic education. The research deals with their attitude to the Church and opinions on religious teaching, norms and prohibitions. Key words: religiosity, religion, fertility, qualitative research, European Values Study

The aim of this theis is to evaluate reproducing and production qualities of sheep (suffolk race)in selected breding. Reproducing indicators were followed on the basis of calculated average values in sterility, death after delivery, pregnancy and fertility in percents. From the production indicators, average weight and fat width of rams and female lambs were followwed within the period of 100 days. The results were transformed into tables and diagrams. In this thesis ascertained information was also cetified by scattering analasis of F test on significance surface.

This work shows that the level of reproduction is influenced primarily by management reproduction. Selected indicators reproductions reached cows of the Holstein breed below-average values u (service period, pregnancy after first insemination and insemination index) to average values (interim) and achieve the goals set out indicators breeding Holstein cattle in lactation. Recommendations for breeders is to improve search říjících the cows. Further improve the diagnosis of pregnancy in cows inseminated. Improve the overall management of the herd reproduction.