Trends in attitudes toward abortion, 1972-1975.
D000028:Abortion, Induced; D000367:Age Factors; D001290:Attitude; D004522:Educational Status; D005260:Female; D006801:Humans; D008297:Male; D008913:Minority Groups; D011247:Pregnancy; D012067:Religion; D012111:Residence Characteristics; D012494:Sampling Studies; D012737:Sex Factors; D014481:United States