anybody used letrozole+ gonatropin for IVF


Hello All,
We are getting ready for our 5 th IVF cycle. This time we are trying something different. I began EPP ( estrace pill 2 mg* 2, estraderm patch every 3 days then I will be adding prometrium). Plan is to see how many AF I will have then continue letrozole and gonal f then add ganirelix. I was wondering if anybody tried this protocol, can share your experince with me?
thank you in advance, Ozlem