Because of the increase in ceserean section, assited fertilization and multiple births, late preterem births was suspected to be increased. We aimed to investigate the incidence of late preterm births in our hospital and evaluate their postnatal medical problems in this study. Late premature infants born alive between 340/7- 366/7 pregnancy weeks between January 1, 2013 and December 31, 2014 in Çukurova University Faculty of Medicine Hospital Gynecology and Obstetrics Clinic were included in this study. Problems faced by these infants in the first 15 days were evaluated retrospectively. A total of 3716 infants (97 twins and 22 triplets) were induced in the study. Late premature 641 infants (30 twins and 7 triplet births) constituted 17.2% of all infants born. Jaundice in 208 late premature infants (44.6%), feeding intolerance in 124 infants (26.6%), transient tachypnea of newborn in 60 infants (12.9%), hypoglycemia in 48 infants (10.3%), respiratory distress syndrome in 41 infants (8.8%), pneumonia in 36 infants (7.7%), early neonatal sepsis in 18 infants (3.9%), nosocomial sepsis in 6 infants (1.3%) and necrotizing enterocolitis in one baby (0.2%) were detected. 59 infants (12.7%) were hospitalized longer than postnatal 15 days. 44 (10.8%) of the infants who reapplied to the hospital again were rehospitalized. As a result, it is significantly important to evaluate late preterm infants in newborn period for diseases which may develop such as feeding intolerance, hypoglycemia, respiratory problem and infection risk. Anahtar Kelimeler : late premature babies, postnatal problems