Background: A neonate undergoes major physiologic changes during transition from intrauterine to extrauterine period. The percentage saturation of hemoglobin takes about 10 minutes to reach a level of more than 90%. This fact is to be borne in mind while resuscitating a newborn with oxygen to avoid its toxicity. It is still unclear whether the oxygen saturation profile could be affected by racial/ethnic variation, birth weight, sex, APGAR score or maternal factors (age, hemoglobin, type of labor) in term healthy babies. This study aimed: 1) To note the time taken for SpO 2 to reach a value of 90%; 2) To note the time taken for preductal and post ductal SpO 2 to equalize; 3) To look for the association between SpO 2 and various infant and maternal factors.