Ruthie Ackerman had long believed that the decision not to have children was a radical act. She'd grown up being told that she came from a long line of women who had abandoned their kids and feared she would pass on her half-brother's rare genetic disorder. So, when she marries a man who doesn't want children, she hopes it will all work out. But a voice in her head keeps returning to the question: What if mothering can be a radical act too? When her marriage veers off course, she goes searching through the twists and turns of her DNA to decide once and for all whether she should become a mother.

By the time Ruthie finally determines she desperately wants a child, she learns that motherhood won't happen the way she thought it would. Now she must enter the hall of mirrors where biology, genetics and philosophy collide as she wonders what it means to both create, and nurture, a life. What does inheritance really entail? What does it mean to be a "good" mother? When it comes down to it, how important is nature versus nurture? And where are the models for what a "good life" can look like for women, both with and without children?

Synthesizing reportage and memoir, The Mother Code unravels how we've come to understand the institution of motherhood. What emerges is a groundbreaking new vision for what it means to parent: a mother code that goes beyond our bloodlines and genetics and instead urges us to embrace inheritance as the legacy we want to leave behind for those we love.