Sentence examples for by differences in fertility from inspiring English sources

Fixing this weak link in Neel's original argument, thrifty-gene proponents, notably Prentice and colleagues, have emphasized the high selective intensity engendered by differences in fertility [ 4].

I also show how ethnic differences in fertility levels can be explained by differences in fertility intentions and the likelihood of meeting those intentions.

The objective of this paper was to examine whether the regional differences in organochlorine exposure levels are paralleled by differences in couple fertility and semen quality at the population level.

Here, we examine whether migrants make a disproportionate contribution to population growth in Kinshasa by examining differences in fertility profiles between in-migrants and permanent Kinshasa residents.

Rents are the income earned by these owners generated by the differences in fertilities of resource mines.

Analysis by ethnicity suggested that there are differences in fertility patterns by ethnic background, but because of the small numbers and the large area grouping necessary, these data were not useful.

First, there is an evident north-south gradient, which can be explained by long-persisting European differences in fertility levels.

We also identify characteristics that may influence differences in fertility by migration status.

In results not shown, there were no significant differences in fertility by age at most recent migration.

While other studies have demonstrated the important differences in fertility rates between different African countries [46], our study did not find such differences in fertility intentions; however, this conclusion is limited by our sample size.

The higher fertility for migrants remains even after controlling for characteristics that differ from non-migrants, suggesting that even though migrants systematically differ from non-migrants with regard to age and marital status, differences in fertility are not explained by differences in background characteristics.