To explore parental experiences of therapeutic hypothermia (TH) in their newborn infant suffering from hypoxic ischaemic encephalopathy following perinatal asphyxia. Since more than a decade, newborn infants are treated with TH following perinatal asphyxia to reduce mortality and disabilities and to improve neurological outcome. The infants' body temperature is lowered to 33.5°C for 72hr, and the infant is usually cared for in an open incubator. The parents are not able to hold their infant skin to skin, which risks causing emotional reactions in parents and a loss of normal parent-infant bonding. A qualitative descriptive design using semi-structured interviews. Up to 7months after the event, interviews were conducted with 14 parents of seven infants who had received TH in a neonatal intensive care unit (NICU) in Sweden. The interviews were transcribed and analysed using framework approach. Findings were reported following the Standard for Reporting Qualitative Research (SRQR) checklist. From the interviews, an overall theme was found: Transition through a life-altering time, and three categories: (a) trepidation about prognosis, (b) transitioning into parenthood supported by the caring philosophy of family-centred care (FCC) and (c) rewarming as a milestone. Parental experiences of TH are based on the immediate emotions and stress of uncertainty of the infant's prognosis. The values of FCC in the NICU append a natural transitioning into parenthood by parental involvement in nursing care and decisions. The rewarming of the infant is seen as a restart to more or less normal circumstances from the critical period of delivery and TH. The management of NICUs should update the awareness of and deepen knowledge about FCC. The emphasis ought to be on adequate information about TH and the values of FCC to parents in the NICU context.