Krupa Padhy examines where we have got to after 40 years of IVF. In England, she visits a family made up of white British parents and their three boys, plus a ‘snow baby’: created during an IVF cycle for her Indian-American genetic parents, but adopted as an embryo by her birth family. She hears from ethicists and law makers from around the world about how countries have struggled to adapt to new technological realities, and discovers stories that challenge ideas of what IVF is for, like that of an Indian woman who used her dead son’s sperm to create grandchildren.