The Cesarean section is the most frequently performed surgical intervention in most countries, in Chile there are approximately 80,000 cases per year. In the postoperative period, effective analgesia is essential since patients define the absence of intra- and post-cesarean pain as priorities[1]. On the other hand, entities such as cronical pain and postpartum depression have been associated with persistent postoperative pain and difficulty in mother-child interaction[2]. Intrathecal morphine (ITM) was first described in obstetric analgesia in the 1980s and has since become widely used for post-cesarean section analgesia due to its prolonged analgesic action. In this review we will focus on the most relevant aspects that may lead to the incorporation of MIT in the Analgesia protocols for Cesarean section in our country.