Introduction It is now widely recognised that reduced fertility in dairy herds is one of the most important factors affecting producer profitability. Roche (2006) has defined the effect of infertility on profitability as: (i) prolonged calving interval with fewer calves and less milk per cow; (ii) increased replacement costs; (iii) increased labour, semen and veterinary bills; and (iv) an exten...

The paper develops a general equilibriummodel where population sources, such as fertility and mortality rates, are chosen variables. It is shown that the evolution of population over time depends on income and relative prices of mortality and fertility rates. Initially as a country develops, countries should face a period with increasing fertility and higher population growth rates but later fe...

This paper studies completed parity distributions for all the industrialized and developing countries that participated in the World Fertility Survey. This is done by means of a table based on parity calculated for all ever-married women above age 40 by educational and residential subcategories. The information is also used to compare mean family and mean sibship sizes and to study changes in...

India’s fertility transition is driven by major fertility declines among women who are illiterate. Consequently, the earlier emphasis on women’s education and socio-economic conditions as determinants of fertility decline is shifting to research on the study of reciprocally initiated positive contributions of fertility decline to the improvement of the health of women and children. This analysi...

Societal conditions for early and high rates of childbearing were replaced by conditions generating late and low levels of fertility common in Western countries. Central among factors shaping the latter behaviour (job insecurity, unstable partnership relationships, expensive housing, and profound changes in norms, values and attitudes) were the following: increasing proportions of young people ...

In a continent where most countries exhibit low or “lowest-low” fertility, the experience of Sweden and its Nordic neighbors has become of interest to social scientists and policy makers concerned with the causes and consequences of low fertility. Nordic fertility can be labeled as “highest-low”: the fertility of Sweden and its neighbors is below the replacement level of 2.1 children per woman ...

in recent decades, the fertility rate in iran has gone through dramatic changes due to different reasons. one of these reasons is women’s increasing participation in the workforce and modern employment which has imposed changes to the childbearing behavior. on the other hand, working women face different challenges regarding childbearing. the present qualitative study investigates the childbear...

no domestic availability to breeder turkey stocks and turkey hatching eggs prompted the present experiment that aimed to evaluate the feasibility of a conventional artificial insemination (ai) procedure in british united turkey (but) for the first time in iran. broiler turkeys were restrictedly fed, grown for 46 weeks, and used for the current study (10 turkey toms and 24 turkey hens in total)....

Fertility trends in rural China during the 1980s are examined in terms of the cohort and period effect of fertility. Variations in fertility among the subregions of rural China are also examined, and it is demonstrated that birth bunching characterized the decade. The implications for future fertility and family planning are discussed also. Analysis is based on the stratified, systematic, cl...

to what extent do socio-economic and cultural factors influence fertility? what are women's fertility conditions among different religious sub-groups? to answer these questions, the required data were collected from 362 shiites and sunni women living in sarpolzhab, iran. then the collected data were analyzed. the results indicated a statistically significant difference between the reproductive ...