As expected, younger GA and the presence of common complications of preterm birth are associated with a higher risk of readmission at all time periods after discharge (Tables 2 and 3). In general, rates of readmission in infants born at a gestational age between 24 and 28 weeks have a threefold to fourfold increase in readmissions compared with moderately preterm infants born at a GA between 32 and 34 weeks, and a fivefold to tenfold increase rate compared with infants born at term [18, 27]. Readmissions within 7–14 days of discharge in infants born between 32 and 36 weeks GA are elevated in several studies compared to infants born at an earlier GA, likely secondary to discharge of these moderate to late preterm infants at a chronological age that places them at risk for readmission secondary to jaundice or feeding disorders. The best example of this changing risk of readmission at various time periods is shown in the study of Ray et al. [20]. Using data from over 7 million births in California over a 13-year period, Fig. 1 shows the declining trend in hospital readmissions with older gestational ages, except for a hump in readmission risk within 14 days of discharge in the infants born at a GA between 34 and 36 weeks. These odds ratios remain increased compared to term infants for all GA below 38 weeks.