Table 1.

Complications associated with preterm birth

Complication	Percentage of Infants Affected	Reference
Respiratory distress syndrome	10.5% for infants born at 34 weeks of gestation	[70]
Sepsis	Cumulative incidences of early and late onset sepsis are 4.42 and 6.30 episodes per 1,000 admissions in late preterm infants	[71]
Apnea of prematurity	7% of infants born at 34 to 35 weeks of gestation, 15% at 32 to 33 weeks, 54% at 30 to 31 weeks, and nearly all infants <29 weeks gestation	[72]
Necrotizing enterocolitis	Average of 11% between 22 and 28 weeks of gestation	[73]
Patent ductus arteriosis	Average of 46% between 22 and 28 weeks of gestation	[73]
Bronchopulmonary dysplasia	Variation from 12 to 32% in infants born at less than 32 weeks of gestation	[74]