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  • Title: An analysis of factors in fertility control in Japan -- an updated and revised version.
    Author: Muramatsu M.
    Journal: Koshu Eisei In Kenkyu Hokoku; 1973; 22(4):228-36. PubMed ID: 12336427.
    Abstract:
    An attempt is made to estimate the numbers of pregnancies and live births which would have occurred in a given year if all the fertility control carried out until that year was removed suddenly, and then to measure, on the basis of the results obtained, the total amount of fertility control practiced in order to suppress fertility performance to the low level as actually observed. However, a slightly lower value was used for an estimate of the theoretically expected number of pregnancies in the absence of fertility control. Calculations for 1970 were included. The results obtained indicate that the low birth rates recorded in the years under consideration were only made possible by a large volume of deliberate fertility control through either contraception or induced abortion, or both. In 1970, a total of 5.32 million births would have occurred besides the recorded 1.93 million if no antifertility effort was exercised. The real total number of induced abortions is believed to be still large despite the declining trend in reported abortions in recent years. However, it is still quite certain that Japanese couples have made a steady shift from induced abortion to contraception in their regulation of fertility.
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