Continuous low-dose progestagen oral contraceptives.
D003276:Contraceptives, Oral; D003280:Contraceptives, Oral, Synthetic; D005260:Female; D006801:Humans; D045167:Progesterone Congeners / Q000494:pharmacology*
D003276:Contraceptives, Oral; D003280:Contraceptives, Oral, Synthetic; D045167:Progesterone Congeners