(+-)-Norgestrel and ethinylestradiol 18,19-Dinor-17-alpha-pregn-4-en-20-yn-3-one, 13-ethyl-17-hydroxy-, (+-)-, and 19-nor-17-alpha-pregna-1,3,5(10)-trien-20-yne-3,17-diol Ethinylestradiol and (+-)-norgestrel Ethinylestradiol mixt. with WY 3707 JF8300100 WY 3707 mixt. with ethinylestradiol