Investigating the biographic, social and temperamental correlates of young infants' sleeping, crying and feeding routines

► Intrinsic and extrinsic factors predicting infant cry, sleep and feed routines. ► Birth-order predicts feed duration and with temperament predicts sleep duration. ► Feeding method predicts feed frequency and with sex predicts night wake frequency. ► Age predicts cry frequency. ► Infant routine research must recognise the potential role that birth-order has.