When same-sex couples have a child via a donor or surrogate, one parent is biologically related to the newborn while the other’s relationship begins with the birth. That was the case for Jennifer Berney, who gave birth to a baby boy as her partner, Kellie, looked on. Berney joins host Krys Boyd to talk about how these families are redefining our understanding of heredity and paternity. Her essay “Becoming Family” appears on the web site Longreads.