Competition Between Spontaneous and Induced Abortion

Author:

Potter R. G.1,Ford K.1,Moots B.2

Affiliation:

1. Department of Sociology, Brown University, Providence, Rhode Island 02912

2. University of Michigan Population Studies Center, 1225 S. University Ave., Ann, Arbor, Michigan 48104

Abstract

Abstract Because of their similar timing in pregnancy, spontaneous and induced abortions can be viewed as competing outcomes. Some intended abortion operations are anticipated by earlier miscarriages while some potential miscarriages are forestalled by earlier deliberate interruptions of pregnancy. Previous treatments of this competition are reviewed, and a new analysis is made on the basis of New York data. A simple rule for approximating the reduction in apparent incidence of spontaneous abortion in the presence of induced abortion is presented. The effects of nonreporting and misreporting of pregnancy outcomes upon this rule are examined by means of the Perrin-Sheps renewal process. Two expectations are tested on Taiwanese data.

Publisher

Duke University Press

Subject

Demography

Reference22 articles.

1. Patterns and Implications of Long-Term IUD Use in Taichung, Taiwan;Avery;Studies in Family Planning,1973

2. A Monte Carlo Simulation of Human Reproduction;Barrett;Genus,1969

3. The Randomized Response Techniques as Used in the Taiwan Outcome of Pregnancy Study;Chi;Studies in Family Planning,1972

4. A Stochastic Model of Human Reproduction: Some Preliminary Results;Das Gupta, Prithwis;Theoretical Population Biology,1973

5. Inhomogeneous Semi-Markov Processes, Select Actuarial Tables, and Duration-Dependence in Demography;Hoem,1972

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