How did their friend with two dads come to be — is it time to talk surrogacy? Or what about the classmate who was adopted by a single mother? Fertility treatments are mainstream, should parents dole out the basics of IVF (In vitro fertilization) and IUI (intra-uterine insemination)? As medical breakthroughs continue there's even the prospect of a three-parent conception method, so where should the conversation with our children end? What will (did) you tell your kids?