Most women upon learning that they’re pregnant experience two distinct and almost simultaneous reactions: overwhelming joy and deeply internalized anxiety. Being a parent is the greatest responsibility most of us will ever face, and the work begins the moment we realize we’re carrying that little bundle of cells. Pregnancy is a time of dramatic physical and lifestyle changes (hello heartburn, goodbye sushi) that have a tendency to make us kind of want to freak out. There’s so much to plan for—childbirth classes, baby showers, health insurance research, childcare options—it’s enough to send many of...