Article: A brief history of population control and contraception. (Symposium: Overpopulation and Contraception)

Few, if any, individuals or societies have ever approached the maximum level of fertility, and the conclusion seems obvious that various customs and methods have been adopted to limit the number of births. Statisticians like to talk of a "total maternity ratio," which could be defined as the average number of previous live births per woman now aged forty-five or over, regardless of whether a particular woman has children (not all women can or do have children). This ratio varies with different groups and societies.

Note that the "total maternity ratio" is based upon live births, which means that abortions are excluded whether they are spontaneous or induced. Being ...

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