TTN = Transient tachypnea of the newborn = "wet lung" = "RDS Type II. Infants sometimes don't clear all their normal lung fluid from in utero immediately. Most common with term infants (mature lungs) born by C-section WITHOUT labor, Usually, mild, <72hrs but can turn ugly if ignored and coupled with pulmonary hypertension or really a misdiagnosed pneumonia. Your patient probably doesn't have BOTH, but may be on antibiotics just in case. Can't tell th difference at first by X-ray. Dr. Nancy