What Is The Purpose Of Taking Femilon?

my friends wife underwent a surgery for ovarian cyst(choclate cyst) at the age of 18 n took femilon for ayear.now she is 23.though they r trying for a baby she hsnt conceivedn she is nt interest either.she is nt ready to reveal her medical history to her husband.wt cld be the reason?wat is use of femilon in such patients other than its use as an oral contraceptive.wt r its longterm effects?wt r the chances of re occurences of cysts in her?