<prompt> A preterm infant showed apnoea at bih associated with bradycardia. Apnoea is defined as cessation of respiration for at least:2 sec5 sec10 sec20 sec  <response>: Apnea is defined as a respiratory pause lasting more than 20 seconds--or any pause accompanied by cyanosis and bradycardia. Shoer respiratory pauses associated with cyanosis or bradycardia also qualify as significant apnea, whereas periodic breathing, which is common in full-term and preterm infants, is defined as regularly recurring ventilatory cycles interrupted by sho pauses not associated with bradycardia or color change. Ref: Thilo E.H., Rosenberg A.A. 2012. Chapter 2. The Newborn Infant. In W.W. Hay, Jr., M.J. Levin, R.R. Deterding, J.J. Ross, J.M. Sondheimer Eds, CURRENT Diagnosis Treatment: Pediatrics, 21e. 