What Are The Side Effects Of Progynova And Deviry Tablets?

i have just today been advised to take progynova and deviry tabs. Progynova for 21 days n deviry for the last 7 days of the said 21 days. I'm advised to restart taking the tabs in the manner prescribed,on day 2 of my cycle n repeat for the next 5 cycles. I'm told this wd prepare my endometrium for an ivf treatmt. I'm trying to read up on these tablets from the internet.Is this prescription safe? The side effects i'm reading of ie breast cancer, eye problems,cancer of the endometrius etc are scary. I v been married for 5 years n v not yet gotten pregnant.