Birth control usage among abortion patients.
D000029:Abortion, Legal; D000032:Abortion, Therapeutic; D000293:Adolescent; D000328:Adult; D001741:Black or African American; D000367:Age Factors; D002648:Child; D003267:Contraception; D005191:Family Characteristics; D005260:Female; D006801:Humans; D011247:Pregnancy