a well-known triphasic oral contraceptive ( oc ) containing ethinyl estradiol ( ee ) plus levonorgestrel ( lng ) was compared with a triphasic containing the same dose of ee in combination with a 14 % smaller dose of a new progestogen gestodene ( gtd ) , in a prospective study of 24 and 20 healthy young women , respectively .
C0717761
ethinyl estradiol
C0015011
ee