Althea (cyproterone Acetate And Ethinyl Estradiol) Anyone Using Of Familiar With Cyproterone Acetate Ethinyl Estradiol (Althea)?

Anyone using of familiar with cyproterone acetate ethinyl estradiol (Althea)? - althea (cyproterone acetate and ethinyl estradiol)

It is a pill that I for the first time. and I think that all pills have different period, when it enters into force, to prevent you from getting pregnant too.
Well, this pill "Althea" is with 21 pills and must be on the first day of the menstraution be taken. not say, however, when in fact taken into account, can I be sure that you're pregnant. Can anyone help? I like this pill because its good for the skin too.tnx