Direct mailings to promote family planning.
D003142:Communication; D003276:Contraceptives, Oral; D003365:Costs and Cost Analysis; D005193:Family Planning Services; D005260:Female; D006723:Hong Kong; D006801:Humans; D007194:India; D007434:Intrauterine Devices; D007723:Korea; D011177:Postal Service; D011641:Public Relations; D013624:Taiwan; D014481:United States
D003276:Contraceptives, Oral