Tricycle Pill regime.
D000293:Adolescent; D000328:Adult; D004997:Ethinyl Estradiol / Q000008:administration & dosage*; D005260:Female; D006801:Humans; D008234:Lynestrenol / Q000008:administration & dosage*; D008598:Menstruation; D008875:Middle Aged; D013997:Time Factors
D004997:Ethinyl Estradiol; D008234:Lynestrenol