When moms are forced to leave their newborn babies behind for the first time after giving birth, they can get plenty of jitters. “It can be tough for a new mom to leave baby at home, whether she’s going out for the night with dad, or away for the week on her first business trip out of town,” says pediatrician Dr. Tanya Altmann, author of Mommy Calls: Dr. Tanya Answers Parents’ Top 101 Questions About Babies and Toddlers. But sooner or later, the time comes for every mother to leave the nest, if only for awhile. Fret not, new moms. (OK, fret less.) Dr. Altmann shares her expert tips for getting through those difficult times.