1) "No. Babies don't usually roll over until they are about 5 months old."
Development proceeds in a proximodistal pattern, beginning at the center of the body and moving outward. For example, the infant first begins to focus her eyes, then lifts her head, and later pushes up and rolls over (by about 5 months of age). There is no need to use time and money administering a Denver Developmental Screening Test (DDST); what the mother describes is certainly normal, and the nurse is qualified to make that judgment. Normally, a baby will roll over before she sits alone; it would be very unusual for a 1-month-old to do either. Also, because of proximodistal development, the infant will probably (but not always) roll over before he sits alone. The nurse does not need the physician to answer this mother's question about normal infant development.