We asked six moms about what motherhood is like at a month, six months, a year, five years, 15 years, and 30 years. Does the mother of a 30-year-old feel like she knows what she’s doing any more than the mother of a 1-month-old baby? What are the greatest challenges and triumphs of motherhood? What we wanted to define was how mothering changes as children age — what we learned is that through years of challenges, heartache, and joy, once you’re a mother, “Everything changes. Everything.” Call your mom.