Recently I ran into a former colleague of mine in my company’s parking garage. I knew she’d recently had a baby, but I couldn’t remember when. I recognized the frenzied look of a new mother who’d only recently begun leaving her babe in daycare. We started talking, and I realized this was her first week back to work. My stomach lurched for her. Even after three and a half years, I still get that feeling sometimes, but that first week back, I felt physically ill all day long.