title: Analysis of a representative sample of natural family planning users in England and Wales, 1984-1985.
mesh_terms: D000293:Adolescent; D000328:Adult; D002410:Catholicism; D003267:Contraception / Q000379:methods; D004739:England; D005193:Family Planning Services; D005260:Female; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D008297:Male; D012252:Natural Family Planning Methods; D010061:Ovulation Detection; D010865:Pilot Projects; D011247:Pregnancy; D014852:Wales