5Dr Kavita Jain, 6Dr Veena Mathur, 1Dr. N. J. 2Dr P. P. 3Dr V. P. 4Dr K. J. “Intrathecal Isobaric Ropivacaine - Fentanyl Versus Intrathecal Isobaric Levobupivacaine - Fentanyl for Labor Analgesia Using Single Shot Spinal Technique: Controlled Comparative Double Blinded Study”. International Journal of Medical Science in Clinical Research and Review, vol. 5, no. 04, Aug. 2022, pp. Page: 269-275, https://ijmscrr.in/index.php/ijmscrr/article/view/222.