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The relationship of placenta previa and history of induced abortion
Author(s) -
Johnson L.G.,
Mueller B.A.,
Daling J.R.
Publication year - 2003
Publication title -
international journal of gynecology and obstetrics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.895
H-Index - 97
eISSN - 1879-3479
pISSN - 0020-7292
DOI - 10.1016/s0020-7292(03)00004-3
Subject(s) - placenta previa , medicine , obstetrics , vacuum aspiration , abortion , placenta diseases , odds ratio , curettage , gynecology , placenta , logistic regression , pregnancy , population , fetus , surgery , family planning , research methodology , genetics , environmental health , biology
Objectives: We evaluated the risk of placenta previa being associated with a history of induced abortion by different surgical procedures. Methods: Cases ( n =192) were women who had a singleton delivery complicated by placenta previa at a major obstetric care hospital in western Washington state between April 1, 1990 and December 31, 1992. Controls ( n =622) were women with singleton deliveries not complicated by placenta previa or abruption. Odds ratios, determined by logistic regression, approximate the relative risks. Results: Vacuum aspiration abortion was not associated with an increased risk of placenta previa (OR 0.9, 95% CI 0.6–1.5). However, the risk of placenta previa increased with the number of sharp curettage abortions (OR 2.9, 95% CI 1.0–8.5 for ≥3). Conclusions: Risk of placenta previa may be increased in a dose response fashion by multiple sharp curettage abortions. However, vacuum aspiration does not confer an increased risk, and may be a better alternative.