The every-other-day pill.
D003276:Contraceptives, Oral / Q000008:administration & dosage* / Q000009:adverse effects; D004997:Ethinyl Estradiol / Q000008:administration & dosage*; D005260:Female; D006801:Humans; D008598:Menstruation / Q000187:drug effects; D011247:Pregnancy; D011372:Progestins / Q000008:administration & dosage*
D003276:Contraceptives, Oral; D011372:Progestins; D004997:Ethinyl Estradiol