| Autor: |
Pickens, Gary T., Jacobson, Marc E. |
| Předmět: |
|
| Zdroj: |
International Journal of Environmental Studies; Sep86, Vol. 28 Issue 1, p21, 11p |
| Abstrakt: |
The demographic effects of sex preselection technology are studied by means of mathematical models for completed family size and the sex ratio at birth. It is shown that in the case of an indefinite amount of time available to achieve desired family composition, sex preselection has a substantial effect on completed fertility. When a finite reproductive period is introduced (for example, due to distributions of age at marriage and secondary female sterility) the impact of sex preselection on fertility is greatly reduced. The effect of sex preselection on the sex ratio at birth is pronounced, as illustrated by several hypothetical examples. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
