How old is too old to be a new mother? In the latest installment of our "Change My Mind" series, HuffPost asked two experts in the field of the bioethics of fertility to debate the statement: It's time to drop upper age limits on fertility treatments. Arguing for the "agree" side is Sara Cohen, a fertility law lawyer based in Toronto. Her practice focuses on legal issues surrounding fertility treatments including IVF, egg donation and embryo donation. Arguing for the "disagree" side is Francoise Baylis, Canada Research Chair in Bioethics and Philosophy at Dalhousie University. What do you think?