MSRA-1829

As a foundation doctor on the neonatal ward, you conduct a newborn examination on a six hour old infant. The baby was delivered vaginally at 38 weeks with no risk factors for sepsis and no maternal concerns. The baby was born in a healthy condition, with good tone. However, you observe cyanosis in the peripheries, while the rest of the examination appears normal. Pre and post ductal oxygen saturations are at 97%. What is the probable diagnosis?