Summary Fertility estimates from the 1973 Indonesian Fertility Mortality Survey are presented and compared with estimates from the 1971 population census. Although there are some differences, on the whole the two sources are remarkably consistent, indicating the same regional differentials: highest fertility in Sumatra (T.F.R. in rural areas around 7.0), followed by West Java and Sulawesi, Ba...

Conventional semen analyses are used to evaluate male factor fertility/infertility in humans and other animals. However, their clinical value remains controversial. Therefore, new tools that more accurately assess male fertility based on sperm function and fertilization mechanism are of interest worldwide. While protein markers in spermatozoa that might help differentiate fertile and infertile ...

Low fertility is a pervasive phenomenon. All European countries currently experience below-replacement fertility levels, and the proportion of the world’s population living in a low fertility context continues to increase. The purpose of this contribution is to rethink demographic methods for the analysis of fertility from the perspective of recent research on low fertility and to assess data r...

World population growth has been slowing down, primarily as a result of the reduction in fertility in the majority of countries, both developed and developing. In 1970-1975 there were just 19 countries with below-replacement fertility, but by 2000-2005 there were 65. Over the same time period, the number of countries having very low fertility─that is, a total fertility lower than 1.3 children p...

BACKGROUND Persistent high fertility is associated with mother and child mortality. While most regions in the world have experienced declines in fertility rates, there are conflicting views as to whether Uganda has entered a period of fertility transition. There are limited data available that explicitly detail the fertility trends and patterns in Uganda over the last four decades, from 1973 to...

Conventional theories have little to say about the level at which fertility will stabilize at the end of the demographic transition, although it is often assumed that replacement fertility of about 2.1 births per woman will prevail in the long run. However, fertility has dropped below the replacement level in virtually every population that has moved through the transition. If future fertility ...

Findings from previous studies linking the HIV/AIDS epidemic and fertility of populations have remained inconclusive. In sub-Saharan Africa, demographic patterns point to the epidemic resulting in fertility reduction. However, evidence from the 2003 Kenya Demographic and Health Survey (KDHS) has revealed interesting patterns, with regions most adversely affected with HIV/AIDS showing the cleare...

Studies were conducted using 68 males from the seventh generation of a line of meat-type breeder chickens selected for increased duration of fertility of frozen-thawed semen and 69 males of the randomly selected control line. These chickens were used to determine the presence or absence of differences between the selected and control lines with respect to fertility and spermatozoal motility whe...