American Journal of Public Health · 1997 · 52 citations · 12 references
No increased risk of adverse pregnancy outcomes was observed among women who experienced an unplanned pregnancy while using natural family planning.
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Best Subsets Logistic Regression
David W. Hosmer, Borko Jovanovic, Stanley Lemeshow · Biometrics · 1989 · 1.2K citations
Pregnancy Wantedness and Maternal Behavior During Pregnancy
Robert H. Weller, Isaac W. Eberstein, Mohamed Bailey · Demography · 1987 · 95 citations · Full text