Pregnancy rates and birth rates
- 1 July 1962
- journal article
- research article
- Published by Taylor & Francis in Population Studies
- Vol. 16 (1) , 31-37
- https://doi.org/10.1080/00324728.1962.10416767
Abstract
In this article the relationships between pregnancy rates per hundred woman-years of exposure and annual birth rates per thousand population are analyzed by means of a simple population model The assumptions underlying this model are: a rate of 80 pregnancies per hundred woman-years of non-contraceptive exposure, a foetal mortality rate of 20 per cent and an average of 18 years of continuing fertility. It is shown that even with universal practice of contraception and with only two surviving children desired by the average couple, a high level of contraceptive effectiveness is required to reduce the birth rate to the level of the death rate.Keywords
This publication has 1 reference indexed in Scilit:
- Some data on natural fertilityEugenics Quarterly, 1961