Estimation of contraceptive continuation functions.
D000328:Adult; D000367:Age Factors; D001290:Attitude; D003267:Contraception; D003276:Contraceptives, Oral; D005193:Family Planning Services; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007434:Intrauterine Devices; D008433:Mathematics; D011647:Puerto Rico; D012044:Regression Analysis; D013997:Time Factors
D003276:Contraceptives, Oral