What effect does avastin (bevacizumab) have on male fertility?

Unsure: Avastin (bevacizumab) has shown to be deterimental to female reporuductive potential with up to 30-35% have serious complications (ovarian failure). To my knowledge there are no studies on men. Any chemotherapy has the potential risk of causing fertility issues in the future. You may want to consider freezing sperm with a sperm bank or your local reproductive endocrinologist. Also talk to your oncologist.