The effect of childbirth preparation on women of different social classes.
D000293:Adolescent; D000328:Adult; D001290:Attitude; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007743:Labor, Obstetric; D009511:New England; D010353:Patient Education as Topic; D011247:Pregnancy; D012923:Social Class; D011795:Surveys and Questionnaires