Obstructive sleep apnea is common in adults; OSA also occurs in children, especially in preschoolers. Central sleep apnea is most common in middle-aged and older adults. But did you know that infants can have sleep apnea too?Primary sleep apnea of infancy is most common in small, preterm infants; it is rare in full-term newborns.During the first month after birth it may occur in about 84 percent