Abortions preventable by contraceptive practice.
D000029:Abortion, Legal; D000293:Adolescent; D000328:Adult; D003267:Contraception / Q000379:methods*; D005193:Family Planning Services; D005260:Female; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D007087:Illinois; D011247:Pregnancy; D012725:Sexual Behavior; D013223:Statistics as Topic