Factors affecting gestational age at termination of pregnancy.
D000029:Abortion, Legal; D000032:Abortion, Therapeutic; D000293:Adolescent; D000328:Adult; D000367:Age Factors; D003267:Contraception; D005191:Family Characteristics; D005260:Female; D005865:Gestational Age; D006801:Humans; D008131:London; D008598:Menstruation; D010298:Parity; D011183:Postoperative Complications; D011247:Pregnancy; D011258:Pregnancy Tests; D012923:Social Class; D013997:Time Factors