I didn't want the world to define her; I wanted her to define her world. I didn't understand then just how challenging this would be, not only vis-à-vis my daughter, but vis-à-vis me. Like many other women, when I got pregnant I was determined to establish a reasonable balance between my work life and my family. My goal while Julia was small was to take care of her as well as write my first book. This equilibrium sounded good in theory — and in e-mails to my friends — but in truth I had a hard time actually doing it, actually ensuring that I had both a child and my own life. I believed in balance on paper but never felt truly entitled to it. [. . .] We had been together 10 years before we had children, and they had been lived as equals. Suddenly, this was no longer the case. Suddenly, we had very little time together, and most of it was spent talking about his work and life. My future, my career plans and goals, felt sidelined by fatigue and logistics. The "flexibi...