Background: Pain relief during labor, in addition to promoting maternal comfort, prevents the undesirable consequences of stress. Neuraxial techniques are accepted as the gold standard for intrapartum labor analgesia. In present study, we compared fentanyl 25μg alone versus fentanyl 20μg plus bupivacaine 2.5mg as intrathecal labor analgesia with regards to progress of labor at a tertiary hospital. Material and Methods: Present study was single-center, interventional, randomized study, conducted in Pregnant females 20-30 years, Booked antenatal cases, primigravida, full-term, singleton pregnancies, vertex presentation, in active phase of labor with a cervical dilatation of ≥ 4 cm with normal fetal heart rate (FHR) tracings, ASA status grade I/II.