three low dose progestogens , chlormadinone acetate ( 0-5 mg ) , megestrol acetate ( 0-5 mg ) in oil , and norethisterone ( 0-35 mg ) , taken daily , were employed as oral contraceptives in postnatal women who desired to postpone their next pregnancy for up to a year .
C0028356
norethisterone
C0032961
pregnancy