Hi thereWow, you certainly have a lot to think about. I would suggest talking to both your oncologist and fertility specialist / advisor about the best course of action for yourself. From my experience the recommendation is to freeze embryo's for use after you have finished your 5 years, you could then use them. I am in a very similar situation to you - I am 35, having just started my 5 years of tamoxifen. I have however 'negotiated' with my oncologist that in two years time I will take a break from the tamoxifen and try and fall pregnant. After that time I'll then resume the tamoxifen.At the end of the day it's entirely up to you what sort of treatment you have, and when you want to fall pregnant, but get some solid advice to make your decision.All the best